system.string

The system.string module provides string manipulation functions.

Import

import system.string as str;

⚠️ Note Always use an alias when importing system.string since string is a reserved keyword.

Functions

Case Conversion

• uppercase(s) - Convert to uppercase
• lowercase(s) - Convert to lowercase

Search & Test

• length(s) - String length
• contains(s, substr) - Check if contains substring
• startswith(s, prefix) - Check prefix
• endswith(s, suffix) - Check suffix
• indexof(s, substr) - Find substring position

Modification

• substring(s, start, end) - Extract substring
• replace(s, old, new) - Replace occurrences
• trim(s) - Remove whitespace
• split(s, delim) - Split into array
• join(arr, delim) - Join array into string

Example

import system.string as str;
import system.io as io;

let s = "  Hello, World!  ";
io.out.println(str.trim(s));           // "Hello, World!"
io.out.println(str.uppercase(s));      // "  HELLO, WORLD!  "
io.out.println(str.length(str.trim(s)));  // 13

See the full API reference for more details.