Class reference

String

A built-in type for strings.

Description

This is the built-in string Variant type (and the one used by GDScript). Strings may contain any number of Unicode characters, and expose methods useful for manipulating and generating strings. Strings are reference-counted and use a copy-on-write approach (every modification to a string returns a new String), so passing them around is cheap in resources. Some string methods have corresponding variations. Variations suffixed with n (countn(), findn(), replacen(), etc.) are case-insensitive (they make no distinction between uppercase and lowercase letters). Method variations prefixed with r (rfind(), rsplit(), etc.) are reversed, and start from the end of the string, instead of the beginning. To convert any Variant to or from a string, see @GlobalScope.str(), @GlobalScope.str_to_var(), and @GlobalScope.var_to_str(). Note: In a boolean context, a string will evaluate to false if it is empty (""). Otherwise, a string will always evaluate to true.

Constructors

Methods

bool begins_with(String text) const

Returns true if the string begins with the given text. See also ends_with().

PackedStringArray bigrams() const

Returns an array containing the bigrams (pairs of consecutive characters) of this string.

				print("Get up!".bigrams()) # Prints ["Ge", "et", "t ", " u", "up", "p!"]

int bin_to_int() const

Converts the string representing a binary number into an int. The string may optionally be prefixed with "0b", and an additional - prefix for negative numbers.

				print("101".bin_to_int())   # Prints 5
				print("0b101".bin_to_int()) # Prints 5
				print("-0b10".bin_to_int()) # Prints -2
				
				GD.Print("101".BinToInt());   // Prints 5
				GD.Print("0b101".BinToInt()); // Prints 5
				GD.Print("-0b10".BinToInt()); // Prints -2

String c_escape() const

Returns a copy of the string with special characters escaped using the C language standard.

String c_unescape() const

Returns a copy of the string with escaped characters replaced by their meanings. Supported escape sequences are \', \", \\, \a, \b, \f, \n, \r, \t, \v. Note: Unlike the GDScript parser, this method doesn't support the \uXXXX escape sequence.

String capitalize() const

Changes the appearance of the string: replaces underscores (_) with spaces, adds spaces before uppercase letters in the middle of a word, converts all letters to lowercase, then converts the first one and each one following a space to uppercase.

				"move_local_x".capitalize()   # Returns "Move Local X"
				"sceneFile_path".capitalize() # Returns "Scene File Path"
				"2D, FPS, PNG".capitalize()   # Returns "2d, Fps, Png"
				
				"move_local_x".Capitalize();   // Returns "Move Local X"
				"sceneFile_path".Capitalize(); // Returns "Scene File Path"
				"2D, FPS, PNG".Capitalize();   // Returns "2d, Fps, Png"

int casecmp_to(String to) const

Performs a case-sensitive comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "Less than" and "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order. If the character comparison reaches the end of one string, but the other string contains more characters, then it will use length as the deciding factor: 1 will be returned if this string is longer than the to string, or -1 if shorter. Note that the length of empty strings is always 0. To get a bool result from a string comparison, use the == operator instead. See also nocasecmp_to(), filecasecmp_to(), and naturalcasecmp_to().

bool contains(String what) const

Returns true if the string contains what. In GDScript, this corresponds to the in operator.

				print("Node".contains("de")) # Prints true
				print("team".contains("I"))  # Prints false
				print("I" in "team")         # Prints false
				
				GD.Print("Node".Contains("de")); // Prints True
				GD.Print("team".Contains("I"));  // Prints False

If you need to know where what is within the string, use find(). See also containsn().

bool containsn(String what) const

Returns true if the string contains what, ignoring case. If you need to know where what is within the string, use findn(). See also contains().

int count(String what, int from = 0, int to = 0) const

Returns the number of occurrences of the substring what between from and to positions. If to is 0, the search continues until the end of the string.

int countn(String what, int from = 0, int to = 0) const

Returns the number of occurrences of the substring what between from and to positions, ignoring case. If to is 0, the search continues until the end of the string.

String dedent() const

Returns a copy of the string with indentation (leading tabs and spaces) removed. See also indent() to add indentation.

String erase(int position, int chars = 1) const

Returns a string with chars characters erased starting from position. If chars goes beyond the string's length given the specified position, fewer characters will be erased from the returned string. Returns an empty string if either position or chars is negative. Returns the original string unmodified if chars is 0.

int find(String what, int from = 0) const

Returns the index of the first occurrence of what in this string, or -1 if there are none. The search's start can be specified with from, continuing to the end of the string.

				print("Team".find("I")) # Prints -1

				print("Potato".find("t"))    # Prints 2
				print("Potato".find("t", 3)) # Prints 4
				print("Potato".find("t", 5)) # Prints -1
				
				GD.Print("Team".Find("I")); // Prints -1

				GD.Print("Potato".Find("t"));    // Prints 2
				GD.Print("Potato".Find("t", 3)); // Prints 4
				GD.Print("Potato".Find("t", 5)); // Prints -1

Note: If you just want to know whether the string contains what, use contains(). In GDScript, you may also use the in operator.

int findn(String what, int from = 0) const

Returns the index of the first case-insensitive occurrence of what in this string, or -1 if there are none. The starting search index can be specified with from, continuing to the end of the string.

String format(Variant values, String placeholder = "{_}") const

Formats the string by replacing all occurrences of placeholder with the elements of values. values can be a Dictionary, an Array, or an Object. Any underscores in placeholder will be replaced with the corresponding keys in advance. Array elements use their index as keys.

				# Prints "Waiting for Redot is a play by Samuel Beckett, and Redot Engine is named after it."
				var use_array_values = "Waiting for {0} is a play by {1}, and {0} Engine is named after it."
				print(use_array_values.format(["Redot", "Samuel Beckett"]))

				# Prints "User 42 is Redot."
				print("User {id} is {name}.".format({"id": 42, "name": "Redot"}))

Some additional handling is performed when values is an Array. If placeholder does not contain an underscore, the elements of the values array will be used to replace one occurrence of the placeholder in order; If an element of values is another 2-element array, it'll be interpreted as a key-value pair.

				# Prints "User 42 is Redot."
				print("User {} is {}.".format([42, "Redot"], "{}"))
				print("User {id} is {name}.".format([["id", 42], ["name", "Redot"]]))

When passing an Object, the property names from Object.get_property_list() are used as keys.

				# Prints "Visible true, position (0, 0)"
				var node = Node2D.new()
				print("Visible {visible}, position {position}".format(node))

See also the GDScript format string tutorial. Note: Each replacement is done sequentially for each element of values, not all at once. This means that if any element is inserted and it contains another placeholder, it may be changed by the next replacement. While this can be very useful, it often causes unexpected results. If not necessary, make sure values's elements do not contain placeholders.

				print("{0} {1}".format(["{1}", "x"]))           # Prints "x x"
				print("{0} {1}".format(["x", "{0}"]))           # Prints "x {0}"
				print("{a} {b}".format({"a": "{b}", "b": "c"})) # Prints "c c"
				print("{a} {b}".format({"b": "c", "a": "{b}"})) # Prints "{b} c"

Note: In C#, it's recommended to interpolate strings with "$", instead.

String get_base_dir() const

If the string is a valid file path, returns the base directory name.

				var dir_path = "/path/to/file.txt".get_base_dir() # dir_path is "/path/to"

String get_basename() const

If the string is a valid file path, returns the full file path, without the extension.

				var base = "/path/to/file.txt".get_basename() # base is "/path/to/file"

String get_extension() const

If the string is a valid file name or path, returns the file extension without the leading period (.). Otherwise, returns an empty string.

				var a = "/path/to/file.txt".get_extension() # a is "txt"
				var b = "cool.txt".get_extension()          # b is "txt"
				var c = "cool.font.tres".get_extension()    # c is "tres"
				var d = ".pack1".get_extension()            # d is "pack1"

				var e = "file.txt.".get_extension()  # e is ""
				var f = "file.txt..".get_extension() # f is ""
				var g = "txt".get_extension()        # g is ""
				var h = "".get_extension()           # h is ""

String get_file() const

If the string is a valid file path, returns the file name, including the extension.

				var file = "/path/to/icon.png".get_file() # file is "icon.png"

String get_slice(String delimiter, int slice) const

Splits the string using a delimiter and returns the substring at index slice. Returns the original string if delimiter does not occur in the string. Returns an empty string if the slice does not exist. This is faster than split(), if you only need one substring.

				print("i/am/example/hi".get_slice("/", 2)) # Prints "example"

int get_slice_count(String delimiter) const

Returns the total number of slices when the string is split with the given delimiter (see split()).

String get_slicec(int delimiter, int slice) const

Splits the string using a Unicode character with code delimiter and returns the substring at index slice. Returns an empty string if the slice does not exist. This is faster than split(), if you only need one substring.

int hash() const

Returns the 32-bit hash value representing the string's contents. Note: Strings with equal hash values are not guaranteed to be the same, as a result of hash collisions. On the contrary, strings with different hash values are guaranteed to be different.

PackedByteArray hex_decode() const

Decodes a hexadecimal string as a PackedByteArray.

				var text = "hello world"
				var encoded = text.to_utf8_buffer().hex_encode() # outputs "68656c6c6f20776f726c64"
				print(encoded.hex_decode().get_string_from_utf8())
				
				var text = "hello world";
				var encoded = text.ToUtf8Buffer().HexEncode(); // outputs "68656c6c6f20776f726c64"
				GD.Print(encoded.HexDecode().GetStringFromUtf8());

int hex_to_int() const

Converts the string representing a hexadecimal number into an int. The string may be optionally prefixed with "0x", and an additional - prefix for negative numbers.

				print("0xff".hex_to_int()) # Prints 255
				print("ab".hex_to_int())   # Prints 171
				
				GD.Print("0xff".HexToInt()); // Prints 255
				GD.Print("ab".HexToInt());   // Prints 171

String humanize_size(int size) static

Converts size which represents a number of bytes into a human-readable form. The result is in IEC prefix format, which may end in either "B", "KiB", "MiB", "GiB", "TiB", "PiB", or "EiB".

String indent(String prefix) const

Indents every line of the string with the given prefix. Empty lines are not indented. See also dedent() to remove indentation. For example, the string can be indented with two tabulations using "\t\t", or four spaces using " ".

String insert(int position, String what) const

Inserts what at the given position in the string.

bool is_absolute_path() const

Returns true if the string is a path to a file or directory, and its starting point is explicitly defined. This method is the opposite of is_relative_path(). This includes all paths starting with "res://", "user://", "C:\", "/", etc.

bool is_empty() const

Returns true if the string's length is 0 (""). See also length().

bool is_relative_path() const

Returns true if the string is a path, and its starting point is dependent on context. The path could begin from the current directory, or the current Node (if the string is derived from a NodePath), and may sometimes be prefixed with "./". This method is the opposite of is_absolute_path().

bool is_subsequence_of(String text) const

Returns true if all characters of this string can be found in text in their original order. This is not the same as contains().

				var text = "Wow, incredible!"

				print("inedible".is_subsequence_of(text)) # Prints true
				print("Word!".is_subsequence_of(text))    # Prints true
				print("Window".is_subsequence_of(text))   # Prints false
				print("".is_subsequence_of(text))         # Prints true

bool is_subsequence_ofn(String text) const

Returns true if all characters of this string can be found in text in their original order, ignoring case. This is not the same as containsn().

bool is_valid_ascii_identifier() const

Returns true if this string is a valid ASCII identifier. A valid ASCII identifier may contain only letters, digits, and underscores (_), and the first character may not be a digit.

				print("node_2d".is_valid_ascii_identifier())    # Prints true
				print("TYPE_FLOAT".is_valid_ascii_identifier()) # Prints true
				print("1st_method".is_valid_ascii_identifier()) # Prints false
				print("MyMethod#2".is_valid_ascii_identifier()) # Prints false

See also is_valid_unicode_identifier().

bool is_valid_filename() const

Returns true if this string is a valid file name. A valid file name cannot be empty, begin or end with space characters, or contain characters that are not allowed (: / \ ? * " | % < >).

bool is_valid_float() const

Returns true if this string represents a valid floating-point number. A valid float may contain only digits, one decimal point (.), and the exponent letter (e). It may also be prefixed with a positive (+) or negative (-) sign. Any valid integer is also a valid float (see is_valid_int()). See also to_float().

				print("1.7".is_valid_float())   # Prints true
				print("24".is_valid_float())    # Prints true
				print("7e3".is_valid_float())   # Prints true
				print("Hello".is_valid_float()) # Prints false

bool is_valid_hex_number(bool with_prefix = false) const

Returns true if this string is a valid hexadecimal number. A valid hexadecimal number only contains digits or letters A to F (either uppercase or lowercase), and may be prefixed with a positive (+) or negative (-) sign. If with_prefix is true, the hexadecimal number needs to prefixed by "0x" to be considered valid.

				print("A08E".is_valid_hex_number())    # Prints true
				print("-AbCdEf".is_valid_hex_number()) # Prints true
				print("2.5".is_valid_hex_number())     # Prints false

				print("0xDEADC0DE".is_valid_hex_number(true)) # Prints true

bool is_valid_html_color() const

Returns true if this string is a valid color in hexadecimal HTML notation. The string must be a hexadecimal value (see is_valid_hex_number()) of either 3, 4, 6 or 8 digits, and may be prefixed by a hash sign (#). Other HTML notations for colors, such as names or hsl(), are not considered valid. See also Color.html().

bool is_valid_identifier() const

Deprecated.

Use is_valid_ascii_identifier() instead.

Returns true if this string is a valid identifier. A valid identifier may contain only letters, digits and underscores (_), and the first character may not be a digit.

				print("node_2d".is_valid_identifier())    # Prints true
				print("TYPE_FLOAT".is_valid_identifier()) # Prints true
				print("1st_method".is_valid_identifier()) # Prints false
				print("MyMethod#2".is_valid_identifier()) # Prints false

bool is_valid_int() const

Returns true if this string represents a valid integer. A valid integer only contains digits, and may be prefixed with a positive (+) or negative (-) sign. See also to_int().

				print("7".is_valid_int())    # Prints true
				print("1.65".is_valid_int()) # Prints false
				print("Hi".is_valid_int())   # Prints false
				print("+3".is_valid_int())   # Prints true
				print("-12".is_valid_int())  # Prints true

bool is_valid_ip_address() const

Returns true if this string represents a well-formatted IPv4 or IPv6 address. This method considers reserved IP addresses such as "0.0.0.0" and "ffff:ffff:ffff:ffff:ffff:ffff:ffff:ffff" as valid.

bool is_valid_unicode_identifier() const

Returns true if this string is a valid Unicode identifier. A valid Unicode identifier must begin with a Unicode character of class XID_Start or "_", and may contain Unicode characters of class XID_Continue in the other positions.

				print("node_2d".is_valid_unicode_identifier())      # Prints true
				print("1st_method".is_valid_unicode_identifier())   # Prints false
				print("MyMethod#2".is_valid_unicode_identifier())   # Prints false
				print("állóképesség".is_valid_unicode_identifier()) # Prints true
				print("выносливость".is_valid_unicode_identifier()) # Prints true
				print("体力".is_valid_unicode_identifier())         # Prints true

See also is_valid_ascii_identifier(). Note: This method checks identifiers the same way as GDScript. See TextServer.is_valid_identifier() for more advanced checks.

String join(PackedStringArray parts) const

Returns the concatenation of parts' elements, with each element separated by the string calling this method. This method is the opposite of split().

				var fruits = ["Apple", "Orange", "Pear", "Kiwi"]

				print(", ".join(fruits))  # Prints "Apple, Orange, Pear, Kiwi"
				print("---".join(fruits)) # Prints "Apple---Orange---Pear---Kiwi"
				
				string[] fruits = ["Apple", "Orange", "Pear", "Kiwi"];

				// In C#, this method is static.
				GD.Print(string.Join(", ", fruits));  // Prints "Apple, Orange, Pear, Kiwi"
				GD.Print(string.Join("---", fruits)); // Prints "Apple---Orange---Pear---Kiwi"

String json_escape() const

Returns a copy of the string with special characters escaped using the JSON standard. Because it closely matches the C standard, it is possible to use c_unescape() to unescape the string, if necessary.

String left(int length) const

Returns the first length characters from the beginning of the string. If length is negative, strips the last length characters from the string's end.

				print("Hello World!".left(3))  # Prints "Hel"
				print("Hello World!".left(-4)) # Prints "Hello Wo"

int length() const

Returns the number of characters in the string. Empty strings ("") always return 0. See also is_empty().

String lpad(int min_length, String character = " ") const

Formats the string to be at least min_length long by adding characters to the left of the string, if necessary. See also rpad().

String lstrip(String chars) const

Removes a set of characters defined in chars from the string's beginning. See also rstrip(). Note: chars is not a prefix. Use trim_prefix() to remove a single prefix, rather than a set of characters.

bool match(String expr) const

Does a simple expression match (also called "glob" or "globbing"), where * matches zero or more arbitrary characters and ? matches any single character except a period (.). An empty string or empty expression always evaluates to false.

bool matchn(String expr) const

Does a simple case-insensitive expression match, where * matches zero or more arbitrary characters and ? matches any single character except a period (.). An empty string or empty expression always evaluates to false.

int naturalcasecmp_to(String to) const

Performs a case-sensitive, natural order comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "Less than" or "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order. When used for sorting, natural order comparison orders sequences of numbers by the combined value of each digit as is often expected, instead of the single digit's value. A sorted sequence of numbered strings will be ["1", "2", "3", ...], not ["1", "10", "2", "3", ...]. If the character comparison reaches the end of one string, but the other string contains more characters, then it will use length as the deciding factor: 1 will be returned if this string is longer than the to string, or -1 if shorter. Note that the length of empty strings is always 0. To get a bool result from a string comparison, use the == operator instead. See also naturalnocasecmp_to(), filecasecmp_to(), and nocasecmp_to().

int naturalnocasecmp_to(String to) const

Performs a case-insensitive, natural order comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "Less than" or "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order. Internally, lowercase characters are converted to uppercase for the comparison. When used for sorting, natural order comparison orders sequences of numbers by the combined value of each digit as is often expected, instead of the single digit's value. A sorted sequence of numbered strings will be ["1", "2", "3", ...], not ["1", "10", "2", "3", ...]. If the character comparison reaches the end of one string, but the other string contains more characters, then it will use length as the deciding factor: 1 will be returned if this string is longer than the to string, or -1 if shorter. Note that the length of empty strings is always 0. To get a bool result from a string comparison, use the == operator instead. See also naturalcasecmp_to(), filenocasecmp_to(), and casecmp_to().

int nocasecmp_to(String to) const

Performs a case-insensitive comparison to another string. Returns -1 if less than, 1 if greater than, or 0 if equal. "Less than" or "greater than" are determined by the Unicode code points of each string, which roughly matches the alphabetical order. Internally, lowercase characters are converted to uppercase for the comparison. If the character comparison reaches the end of one string, but the other string contains more characters, then it will use length as the deciding factor: 1 will be returned if this string is longer than the to string, or -1 if shorter. Note that the length of empty strings is always 0. To get a bool result from a string comparison, use the == operator instead. See also casecmp_to(), filenocasecmp_to(), and naturalnocasecmp_to().

String num(float number, int decimals = -1) static

Converts a float to a string representation of a decimal number, with the number of decimal places specified in decimals. If decimals is -1 as by default, the string representation may only have up to 14 significant digits, with digits before the decimal point having priority over digits after. Trailing zeros are not included in the string. The last digit is rounded, not truncated.

				String.num(3.141593)     # Returns "3.141593"
				String.num(3.141593, 3)  # Returns "3.142"
				String.num(3.14159300)   # Returns "3.141593"

				# Here, the last digit will be rounded up,
				# which reduces the total digit count, since trailing zeros are removed:
				String.num(42.129999, 5) # Returns "42.13"

				# If `decimals` is not specified, the maximum number of significant digits is 14:
				String.num(-0.0000012345432123454321)     # Returns "-0.00000123454321"
				String.num(-10000.0000012345432123454321) # Returns "-10000.0000012345"

String num_int64(int number, int base = 10, bool capitalize_hex = false) static

Converts the given number to a string representation, with the given base. By default, base is set to decimal (10). Other common bases in programming include binary (2), octal (8), hexadecimal (16). If capitalize_hex is true, digits higher than 9 are represented in uppercase.

String num_scientific(float number) static

Converts the given number to a string representation, in scientific notation.

				var n = -5.2e8
				print(n)                        # Prints -520000000
				print(String.num_scientific(n)) # Prints -5.2e+08
				
				// This method is not implemented in C#.
				// Use `string.ToString()` with "e" to achieve similar results.
				var n = -5.2e8f;
				GD.Print(n);                // Prints -520000000
				GD.Print(n.ToString("e1")); // Prints -5.2e+008

Note: In C#, this method is not implemented. To achieve similar results, see C#'s Standard numeric format strings.

String num_uint64(int number, int base = 10, bool capitalize_hex = false) static

Converts the given unsigned int to a string representation, with the given base. By default, base is set to decimal (10). Other common bases in programming include binary (2), octal (8), hexadecimal (16). If capitalize_hex is true, digits higher than 9 are represented in uppercase.

String pad_decimals(int digits) const

Formats the string representing a number to have an exact number of digits after the decimal point.

String pad_zeros(int digits) const

Formats the string representing a number to have an exact number of digits before the decimal point.

String path_join(String path) const

Concatenates path at the end of the string as a subpath, adding / if necessary. Example: "this/is".path_join("path") == "this/is/path".

String remove_char(int what) const

Removes all occurrences of the Unicode character with code what. Faster version of replace() when the key is only one character long and the replacement is "".

String repeat(int count) const

Repeats this string a number of times. count needs to be greater than 0. Otherwise, returns an empty string.

String replace(String what, String forwhat) const

Replaces all occurrences of what inside the string with the given forwhat.

String replace_char(int key, int with) const

Replaces all occurrences of the Unicode character with code key with the Unicode character with code with. Faster version of replace() when the key is only one character long. To get a single character use "X".unicode_at(0) (note that some strings, like compound letters and emoji, can be composed of multiple unicode codepoints, and will not work with this method, use length() to make sure).

String replace_chars(String keys, int with) const

Replaces any occurrence of the characters in keys with the Unicode character with code with. See also replace_char().

String replacen(String what, String forwhat) const

Replaces all case-insensitive occurrences of what inside the string with the given forwhat.

String reverse() const

Returns the copy of this string in reverse order. This operation works on unicode codepoints, rather than sequences of codepoints, and may break things like compound letters or emojis.

int rfind(String what, int from = -1) const

Returns the index of the last occurrence of what in this string, or -1 if there are none. The search's start can be specified with from, continuing to the beginning of the string. This method is the reverse of find().

int rfindn(String what, int from = -1) const

Returns the index of the last case-insensitive occurrence of what in this string, or -1 if there are none. The starting search index can be specified with from, continuing to the beginning of the string. This method is the reverse of findn().

String right(int length) const

Returns the last length characters from the end of the string. If length is negative, strips the first length characters from the string's beginning.

				print("Hello World!".right(3))  # Prints "ld!"
				print("Hello World!".right(-4)) # Prints "o World!"

String rpad(int min_length, String character = " ") const

Formats the string to be at least min_length long, by adding characters to the right of the string, if necessary. See also lpad().

PackedStringArray rsplit(String delimiter = "", bool allow_empty = true, int maxsplit = 0) const

Splits the string using a delimiter and returns an array of the substrings, starting from the end of the string. The splits in the returned array appear in the same order as the original string. If delimiter is an empty string, each substring will be a single character. If allow_empty is false, empty strings between adjacent delimiters are excluded from the array. If maxsplit is greater than 0, the number of splits may not exceed maxsplit. By default, the entire string is split, which is mostly identical to split().

				var some_string = "One,Two,Three,Four"
				var some_array = some_string.rsplit(",", true, 1)

				print(some_array.size()) # Prints 2
				print(some_array[0])     # Prints "One,Two,Three"
				print(some_array[1])     # Prints "Four"
				
				// In C#, there is no String.RSplit() method.

String rstrip(String chars) const

Removes a set of characters defined in chars from the string's end. See also lstrip(). Note: chars is not a suffix. Use trim_suffix() to remove a single suffix, rather than a set of characters.

float similarity(String text) const

Returns the similarity index (Sørensen-Dice coefficient) of this string compared to another. A result of 1.0 means totally similar, while 0.0 means totally dissimilar.

				print("ABC123".similarity("ABC123")) # Prints 1.0
				print("ABC123".similarity("XYZ456")) # Prints 0.0
				print("ABC123".similarity("123ABC")) # Prints 0.8
				print("ABC123".similarity("abc123")) # Prints 0.4

String simplify_path() const

If the string is a valid file path, converts the string into a canonical path. This is the shortest possible path, without "./", and all the unnecessary ".." and "/".

				var simple_path = "./path/to///../file".simplify_path()
				print(simple_path) # Prints "path/file"

PackedStringArray split(String delimiter = "", bool allow_empty = true, int maxsplit = 0) const

Splits the string using a delimiter and returns an array of the substrings. If delimiter is an empty string, each substring will be a single character. This method is the opposite of join(). If allow_empty is false, empty strings between adjacent delimiters are excluded from the array. If maxsplit is greater than 0, the number of splits may not exceed maxsplit. By default, the entire string is split.

				var some_array = "One,Two,Three,Four".split(",", true, 2)

				print(some_array.size()) # Prints 3
				print(some_array[0])     # Prints "One"
				print(some_array[1])     # Prints "Two"
				print(some_array[2])     # Prints "Three,Four"
				
				// C#'s `Split()` does not support the `maxsplit` parameter.
				var someArray = "One,Two,Three".Split(",");

				GD.Print(someArray[0]); // Prints "One"
				GD.Print(someArray[1]); // Prints "Two"
				GD.Print(someArray[2]); // Prints "Three"

Note: If you only need one substring from the array, consider using get_slice() which is faster. If you need to split strings with more complex rules, use the RegEx class instead.

PackedFloat64Array split_floats(String delimiter, bool allow_empty = true) const

Splits the string into floats by using a delimiter and returns a PackedFloat64Array. If allow_empty is false, empty or invalid float conversions between adjacent delimiters are excluded.

				var a = "1,2,4.5".split_floats(",")         # a is [1.0, 2.0, 4.5]
				var c = "1| ||4.5".split_floats("|")        # c is [1.0, 0.0, 0.0, 4.5]
				var b = "1| ||4.5".split_floats("|", false) # b is [1.0, 4.5]

String strip_edges(bool left = true, bool right = true) const

Strips all non-printable characters from the beginning and the end of the string. These include spaces, tabulations (\t), and newlines (\n \r). If left is false, ignores the string's beginning. Likewise, if right is false, ignores the string's end.

String strip_escapes() const

Strips all escape characters from the string. These include all non-printable control characters of the first page of the ASCII table (values from 0 to 31), such as tabulation (\t) and newline (\n, \r) characters, but not spaces.

String substr(int from, int len = -1) const

Returns part of the string from the position from with length len. If len is -1 (as by default), returns the rest of the string starting from the given position.

String to_camel_case() const

Returns the string converted to camelCase.

float to_float() const

Converts the string representing a decimal number into a float. This method stops on the first non-number character, except the first decimal point (.) and the exponent letter (e). See also is_valid_float().

				var a = "12.35".to_float()  # a is 12.35
				var b = "1.2.3".to_float()  # b is 1.2
				var c = "12xy3".to_float()  # c is 12.0
				var d = "1e3".to_float()    # d is 1000.0
				var e = "Hello!".to_float() # e is 0.0

int to_int() const

Converts the string representing an integer number into an int. This method removes any non-number character and stops at the first decimal point (.). See also is_valid_int().

				var a = "123".to_int()    # a is 123
				var b = "x1y2z3".to_int() # b is 123
				var c = "-1.2.3".to_int() # c is -1
				var d = "Hello!".to_int() # d is 0

String to_kebab_case() const

Returns the string converted to kebab-case. Note: Numbers followed by a single letter are not separated in the conversion to keep some words (such as "2D") together.

				"Node2D".to_kebab_case()               # Returns "node-2d"
				"2nd place".to_kebab_case()            # Returns "2-nd-place"
				"Texture3DAssetFolder".to_kebab_case() # Returns "texture-3d-asset-folder"
				
				"Node2D".ToKebabCase();               // Returns "node-2d"
				"2nd place".ToKebabCase();            // Returns "2-nd-place"
				"Texture3DAssetFolder".ToKebabCase(); // Returns "texture-3d-asset-folder"

String to_lower() const

Returns the string converted to lowercase.

PackedByteArray to_multibyte_char_buffer(String encoding = "") const

Converts the string to system multibyte code page encoded PackedByteArray. If conversion fails, empty array is returned. The values permitted for encoding are system dependent. If encoding is empty string, system default encoding is used. - For Windows, see Code Page Identifiers .NET names. - For macOS and Linux/BSD, see libiconv library documentation and iconv --list for a list of supported encodings.

String to_pascal_case() const

Returns the string converted to PascalCase.

String to_snake_case() const

Returns the string converted to snake_case. Note: Numbers followed by a single letter are not separated in the conversion to keep some words (such as "2D") together.

				"Node2D".to_snake_case()               # Returns "node_2d"
				"2nd place".to_snake_case()            # Returns "2_nd_place"
				"Texture3DAssetFolder".to_snake_case() # Returns "texture_3d_asset_folder"
				
				"Node2D".ToSnakeCase();               // Returns "node_2d"
				"2nd place".ToSnakeCase();            // Returns "2_nd_place"
				"Texture3DAssetFolder".ToSnakeCase(); // Returns "texture_3d_asset_folder"

String to_upper() const

Returns the string converted to UPPERCASE.

String trim_prefix(String prefix) const

Removes the given prefix from the start of the string, or returns the string unchanged.

String trim_suffix(String suffix) const

Removes the given suffix from the end of the string, or returns the string unchanged.

String uri_decode() const

Decodes the string from its URL-encoded format. This method is meant to properly decode the parameters in a URL when receiving an HTTP request. See also uri_encode().

				var url = "$DOCS_URL/?highlight=Godot%20Engine%3%docs"
				print(url.uri_decode()) # Prints "$DOCS_URL/?highlight=Godot Engine:docs"
				
				var url = "$DOCS_URL/?highlight=Godot%20Engine%3%docs"
				GD.Print(url.URIDecode()) // Prints "$DOCS_URL/?highlight=Godot Engine:docs"

Note: This method decodes + as space.

String uri_encode() const

Encodes the string to URL-friendly format. This method is meant to properly encode the parameters in a URL when sending an HTTP request. See also uri_decode().

				var prefix = "$DOCS_URL/?highlight="
				var url = prefix + "Redot Engine:docs".uri_encode()

				print(url) # Prints "$DOCS_URL/?highlight=Godot%20Engine%3%docs"
				
				var prefix = "$DOCS_URL/?highlight=";
				var url = prefix + "Redot Engine:docs".URIEncode();

				GD.Print(url); // Prints "$DOCS_URL/?highlight=Godot%20Engine%3%docs"

String uri_file_decode() const

Decodes the file path from its URL-encoded format. Unlike uri_decode() this method leaves + as is.

String validate_filename() const

Returns a copy of the string with all characters that are not allowed in is_valid_filename() replaced with underscores.

String validate_node_name() const

Returns a copy of the string with all characters that are not allowed in Node.name (. : @ / " %) replaced with underscores.

String xml_escape(bool escape_quotes = false) const

Returns a copy of the string with special characters escaped using the XML standard. If escape_quotes is true, the single quote (') and double quote (") characters are also escaped.

String xml_unescape() const

Returns a copy of the string with escaped characters replaced by their meanings according to the XML standard.

Operators

bool operator !=(String right)

Returns true if both strings do not contain the same sequence of characters.

String operator %(Variant right)

Formats the String, replacing the placeholders with one or more parameters. To pass multiple parameters, right needs to be an Array.

				print("I caught %d fishes!" % 2) # Prints "I caught 2 fishes!"

				var my_message = "Travelling to %s, at %2.2f km/h."
				var location = "Deep Valley"
				var speed = 40.3485
				print(my_message % [location, speed]) # Prints "Travelling to Deep Valley, at 40.35 km/h."

For more information, see the GDScript format strings tutorial. Note: In C#, this operator is not available. Instead, see how to interpolate strings with "$".

String operator +(String right)

Appends right at the end of this String, also known as a string concatenation.

String operator +(StringName right)

Appends right at the end of this String, returning a String. This is also known as a string concatenation.

bool operator <(String right)

Returns true if the left String comes before right in Unicode order, which roughly matches the alphabetical order. Useful for sorting.

bool operator <=(String right)

Returns true if the left String comes before right in Unicode order, which roughly matches the alphabetical order, or if both are equal.

bool operator ==(String right)

Returns true if both strings contain the same sequence of characters.

bool operator >(String right)

Returns true if the left String comes after right in Unicode order, which roughly matches the alphabetical order. Useful for sorting.

bool operator >=(String right)

Returns true if the left String comes after right in Unicode order, which roughly matches the alphabetical order, or if both are equal.

String operator [](int index)

Returns a new String that only contains the character at index. Indices start from 0. If index is greater or equal to 0, the character is fetched starting from the beginning of the string. If index is a negative value, it is fetched starting from the end. Accessing a string out-of-bounds will cause a run-time error, pausing the project execution if run from the editor.

Tutorials

Source revision 4f5b14abade2
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