title: How to sum elements at the same index in separate arrays using for loop (JavaScript)
body: <p>Given two arrays of integers:</p>
  <pre><code>const arr3 = [11, 12, 13, 14, 15,];
  const arr4 = [16, 17, 18, 19, 20,];
  </code></pre>
  <p>Using For-Loop, how do I add up each element in the same position and
  create a new array containing the sum of each pair?
  Both arrays are of the same length.</p>