implement BigInt addition

2022年5月1日

小于 1 分钟

Question

Luckily we have BigIntopen in new window in JavaScript so handle big numbers.

What if we need to do it by ourselves for older browsers?

You are asked to implement a string addition function, with all non-negative integers in string.

add('999999999999999999', '1')
// '1000000000000000000'

Don't use BigInt directly, it is not our goal here.

/**
 * @param {string} num1
 * @param {string} num2
 * @return {string}
 */
function add(num1, num2) {
  // your code here
}