How do i generate and sum up random numbers from an array in javascript and python

Question

I have a function that takes an array and a target number. The goal is two generate any two random numbers from the array and sum them up. If the sum of the two random integers is equal to the target number, I then have to return the index of the two random numbers in the array.

Here is my code so far, I keep getting a stderr. How do you recommend I go about this.

function twoSum (numbers, target) {
  let numIdx = [];
  let sum = 0;
  let firstValue = 0;
  let secValue = 0

  while(sum !== target) {
    firstValue = Math.floor(Math.random() * numbers.length);
    secValue = Math.floor(Math.random() * numbers.length);
    sum = firstValue + secValue;
    
    if (sum === target) {
      numIdx.push(numbers[firstValue])
      numIdx.push(numbers[secValue])
      return numIdx
    }
  }
}

Answer 1

Loop through array of numbers

Then for each one of those numbers loop through again and check if number1 + number2 is equal to your target and also that number1 and number2 arent at the same position in the array (unless that's okay with you)

and return each index

function twoSum(numbers, target) {
  // Loop through the array of numbers
  for (let i = 0; i < numbers.length; i++) {
    const number1 = numbers[i];

    for (let j = 0; j < numbers.length; j++) {
      const number2 = numbers[j];
      // Check if number1 + number2 is equal to target and also make sure number1 and number2 aren't at the same index in the array
      if (number1 + number2 === target && i !== j) {
        return `index 1: ${i}, index 2: ${j}`
      }
    }
  }
}

for instance calling this twoSum([1,2,3], 4) would result in index 1: 0, index 2: 2