take only first 2 letter of a string javascript code example

Example 1: javascript get first 2 char

String.substring(0, 2);
//Return the first two characters of the string
//First parameter is the starting index, 0 corresponding to the first character
//Second parameter is the number of character to return

Example 2: javascript only allow show first few characters from a string

var string = 'Hey, I am good';
string.substring(0,3); // show first 3 characters
//result "Hey"