Convert integer into its character equivalent, where 0 => a, 1 => b, etc

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Assuming you want lower case letters:

var chr = String.fromCharCode(97 + n); // where n is 0, 1, 2 ...

97 is the ASCII code for lower case ‘a’. If you want uppercase letters, replace 97 with 65 (uppercase ‘A’). Note that if n > 25, you will get out of the range of letters.

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