Find the Difference.js

/*Given two strings s and t which consist of only lowercase letters.

String t is generated by random shuffling string s and then add one more letter at a random position.

Find the letter that was added in t.

Example:

Input:
s = "abcd"
t = "abcde"

Output:
e

Explanation:
'e' is the letter that was added.*/

/**
 * @param {string} s
 * @param {string} t
 * @return {character}
 */
var findTheDifference = function(s, t) {
    s = s.split('')
    for(i=0; i<t.length; i++){
        j = s.indexOf(t[i])
        if(j == -1)
            return t[i]
        else{
            s.splice(j,1)
        }
    }
};