string truncate in javascript code example

Example 1: javascript truncate string

var string = "ABCDEFG";
var truncString = string.substring(0, 3); //Only keep the first 3 characters
console.log(truncString); //output: "ABC"

Example 2: str.substring if 2 letters

public String firstTwo(String str) {
    return str.length() < 2 ? str : str.substring(0, 2);
}