1-easy-Two_Sum.js

/**
1. Two Sum

Given an array of integers, return indices of the two numbers such that they add up to a specific target.

You may assume that each input would have exactly one solution, and you may not use the same element twice.

Example:
Given nums = [2, 7, 11, 15], target = 9,

Because nums[0] + nums[1] = 2 + 7 = 9,
return [0, 1].
 */

/**
 * @param {number[]} nums
 * @param {number} target
 * @return {number[]}
 */
var twoSum = function (nums, target) {
  var len = nums.length;
  for (var i = 0; i < len; i++) {
    for (var j = i + 1; j < len; j++) {
      if (nums[i] + nums[j] === target) {
        return [i, j];
      }
    }
  }
};

console.log(twoSum([2, 7, 11, 15], 9));