Javascript: Array Push / Pop

arraypushpop.js

//Array push / pop
var oneSet = [1,2,3,4];
var twoSet = [5,6,7,8];

var j=twoSet.length;
for (var i=0;i<j;i++){
  oneSet.push(twoSet[i]);
  console.log(oneSet);
  console.log(twoSet[i]);
}
console.log(oneSet);

var k=oneSet.length;
for (var i=k; i>0;i--){
  oneSet.pop();
  console.log(oneSet);
  
}
console.log(oneSet);
console.log(twoSet);