//Prompt: write a function that prints every element inside an array containing nested arrays
var inputArray = [ 1, [2, [3, 4]]];

function printElements(array) {
  //loop through the outer array
  for (var i = 0; i < array.length; i++) {
    //if the current element is not an array
    if (!Array.isArray(array[i])) {
      //print it
      console.log(array[i]);
    } else {
        //otherwise, call printElements() again passing in the inner array.
        printElements(array[i]);
      }
  }
}
printElements(inputArray); //logs: 1 2 3 4