Fast and Easy to Understand Java Solution

  • 0

    Every character is just an ASCII value, so keep a running total of the difference in their values. At the end, return the difference as a char.

        public char findTheDifference(String s, String t) {
            int sum = 0;
            for(int i = 0; i < t.length(); i++)
                if(i < s.length())
                    sum -= s.charAt(i);
                sum += t.charAt(i);
            return (char)sum;

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