text: /*Create a function to concatenate two integer arrays.
  
  Examples
  concat([1, 3, 5], [2, 6, 8]) ➞ [1, 3, 5, 2, 6, 8]
  
  concat([7, 8], [10, 9, 1, 1, 2]) ➞ [7, 8, 10, 9, 1, 1, 2]
  */
  const concat = (arr1, arr2) => arr1.concat(arr2);
  