# StringBuilder.withContent constructor

StringBuilder.withContent(

1. String initialContent

)

Creates a StringBuilder with initial content.

`initialContent` the initial string content

A mutable sequence of characters similar to Java's StringBuilder.

This class provides an efficient way to build strings by appending characters, strings, and other data types.

Example usage:

    StringBuilder sb = StringBuilder();
    sb.append("Hello");
    sb.append(" ");
    sb.append("World");
    sb.append("!");

    print(sb.toString()); // "Hello World!"
    print(sb.length()); // 12

## Implementation

    StringBuilder.withContent(String initialContent) : _buffer = StringBuffer(initialContent);