js String prototype charAt
The charAt() method returns the specified character from a string.
Syntax
str.charAt(index)Parameters
index
An integer between 0 and 1-less-than the length of the 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 range, JavaScript returns an empty string.
Examples
var anyString = 'Brave new world';
console.log("The character at index 0 is '" + anyString.charAt(0) + "'"); // 'B'
console.log("The character at index 1 is '" + anyString.charAt(1) + "'"); // 'r'
console.log("The character at index 2 is '" + anyString.charAt(2) + "'"); // 'a'
console.log("The character at index 3 is '" + anyString.charAt(3) + "'"); // 'v'
console.log("The character at index 4 is '" + anyString.charAt(4) + "'"); // 'e'
console.log("The character at index 999 is '" + anyString.charAt(999) + "'"); // ''var str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
document.write(str.charAt(str.length - 1));
// Output: Z