Exercise_1.js

class Stack {
  //Please read sample.java file before starting.
  //Kindly include Time and Space complexity at top of each file
​
    constructor() {
        //Initialize your constructor
        this.MAX = 1000;
        this.top = -1;
        this.a = new Array(this.MAX);
    }
​
    function isEmpty() {
        //Write your code here
    }
​
    function push(x) {
        //Check for stack Overflow
        //Write your code here
    }
​
    function pop() {
        //If empty return 0 and print " Stack Underflow"
        //Write your code here
    }
​
    function peek() {
       //Write your code here
    }
}
​
let s = new Stack();
s.push(10);
s.push(20);
s.push(30);
console.log(s.pop() + " Popped from stack");