/*Write a JavaScript program to test if an
array of integers of length 2 contains 1 or a 3.*/

function checkArray(array) {
  if (array[0] == 1) {
    return 1 + " appears on first position";
  } else if (array[0] == 3) {
    return 3 + " appears on first position";
  } else if (array[1] == 1) {
    return 1 + " appears on second position";
  } else if (array[1] == 3) {
    return 3 + " appears on second position";
  } else {
    return "none of them appears on second position";
  }
}

console.log(checkArray([0, 3]));