Plus One

Given a non-negative number represented as an array of digits, plus one to the number.

The digits are stored such that the most significant digit is at the head of the list.

Tags

Array, Math

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Initiate carry to be 1, easy solution

/** * @param {number[]} digits * @return {number[]} */var plusOne = function (digits) {    var len = digits.length;    var ret = [];    var carry = 1;    for (var i = len - 1; i >= 0; i--) {        var sum = digits[i] + carry;        carry = parseInt(sum / 10);        ret.unshift(sum % 10);    }    if (carry > 0) {        ret.unshift(carry);    }    return ret;};