String.prototype.charAt()

The String object's charAt() method returns a new string consisting of the single UTF-16 code unit located at the specified offset into the string.

Syntax

charAt(index)

Parameters

• index
  • : An integer between 0 and str.length - 1. If the index cannot be converted to the integer or no index is provided, the default is 0, so the first character of str is returned.

Return value

A string representing the character (exactly one UTF-16 code unit) at the specified index. If index is out of range, charAt() returns an empty string.

Description

Characters in a string are indexed from left to right. The index of the first character is 0, and the index of the last character—in a string called stringName is stringName.length - 1. If the index you supply is out of this range, JavaScript returns an empty string.

If no index is provided to charAt(), the default is 0.