#1903 - Largest Odd Number in String

Easy • View on LeetCode • View on GitHub

Problem Description

You are given a string num, representing a large integer. Return the largest-valued odd integer (as a string) that is a non-empty substring of num, or an empty string "" if no odd integer exists.

A substring is a contiguous sequence of characters within a string.

Solution

/**
 * @param {string} num
 * @return {string}
 */
var largestOddNumber = function(num) {
  for (let i = num.length - 1; i >= 0; i--) {
    if (parseInt(num[i]) % 2 === 1) {
      return num.slice(0, i + 1);
    }
  }
  return '';
};