stack in javascript
class Stack{
constructor()
{
this.items = [];
}
push(element)
{
// push element into the items
this.items.push(element);
}
pop()
{
if (this.items.length == 0)
return "Underflow";
return this.items.pop();
}
peek()
{
return this.items[this.items.length - 1];
}
printStack()
{
var str = "";
for (var i = 0; i < this.items.length; i++)
str += this.items[i] + " ";
return str;
}
}