JS .push() & .pop()

gistfile1.txt

function range(max) {
  var retVal = [];
  for (var i = 0; i < max; i++) {
    retVal.push(i * 2);
  }

return retVal;
}

var myArray = range(5);

for (var i = 0; i < myArray.length; i++) {
  alert(myArray[i]);
}

var myArrayPop = myArray.pop();  // .pop() returns last value in an array and also removes it from the array
alert(myArrayPop);
alert(myArray);