String

String data type is used to represent textual data — such as sequences of characters or words. Strings can be defined by enclosing the text in either single quotes (‘) or double quotes (“).

Template strings use backticks and support interpolation with ${}.

The following examples are all valid:

"valid string double quote";
'valid string single quote';
`valid string with interpolation ${customer.firstName}`;Copy to clipboardErrorCopied

String Slicing

You can extract a substring using slice notation [start:end], where the character at the start index is included and the character at the end index is excluded.

"hello"[1:3]    // "el"
"hello"[0:2]    // "he"Copy to clipboardErrorCopied

Operators

Concatenation: a + b Equality: a == b Inequality: a != b

Functions

len

Returns the total number of characters it contains.

len('hello'); // 5Copy to clipboardErrorCopied

upper

Converts a given string to its uppercase form.

upper('hello'); // "HELLO"Copy to clipboardErrorCopied

lower

Converts a given string to its lowercase form.

lower('HeLLo'); // "hello"Copy to clipboardErrorCopied

trim

Removes leading and trailing whitespace from a string.

trim('  hello  '); // "hello"Copy to clipboardErrorCopied

startsWith

Takes two inputs and returns true if the first string begins with the second value.

startsWith('Hello John', 'Hello');  // true
startsWith('Hello John', 'Doe');    // falseCopy to clipboardErrorCopied

endsWith

Returns true if the first string ends with the second value provided.

endsWith('Hello John', 'John');     // true
endsWith('Hello John', 'Hello');    // falseCopy to clipboardErrorCopied

contains

Checks whether the first string includes the second value and returns true if it does.

contains('Hello John', 'ello');     // true
contains('Hello John', 'John');     // true
contains('Hello John', 'Doe');      // falseCopy to clipboardErrorCopied

matches

Evaluates whether the input string satisfies a given regular expression pattern and returns true if it matches.

matches('12345', '^\d+$');   // true
matches('1234a', '^\d+$');   // falseCopy to clipboardErrorCopied

extract

Uses a regular expression to return an array containing the captured groups from the input string.

extract('2025-06-01', '(\d{4})-(\d{2})-(\d{2})'); // ["2025-06-01", "2025", "06", "01"]
extract('foo.bar', '(\w+)\.(\w+)');                // ["foo.bar", "foo", "bar"]Copy to clipboardErrorCopied

split

Splits a string into an array of substrings using a delimiter.

split('a,b,c', ',');         // ["a", "b", "c"]
split('hello world', ' ');   // ["hello", "world"]Copy to clipboardErrorCopied

fuzzyMatch

Performs a fuzzy (approximate) string comparison between two strings. Returns a score between 0 and 1, where 1 is an exact match.

fuzzyMatch('hello', 'helo');     // 0.8 (approximate)
fuzzyMatch('apple', 'orange');   // low scoreCopy to clipboardErrorCopied

string

Convert the input into a string format; throws an error if the conversion fails.

string(20);     // "20"
string(true);   // "true"Copy to clipboardErrorCopied