Tag: plusone

let plusOne = function(digits) {

    let carry = 1;
    for (let i = digits.length - 1; i >= 0; i--) {
        let sum = digits[i] + carry;
        if (sum >= 10) {
            digits[i] = 0;
            carry = 1;
        }
        else {
            digits[i] = sum;
            carry = 0;
        }
    }

    if (carry === 1) digits.unshift(carry);

    return digits;
};