implement BigInt subtraction with sign

2022年5月1日

小于 1 分钟

Question

You are asked to implement a string substraction function, with possible negative integers. Also, '+' plus sign should also be supported

substract('-999999999999999999', '-1')
// '-999999999999999998'

substract('-999999999999999999', '+1')
// '-1000000000000000000'

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

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