Methods of Array in JavaScript

Program 1

// Input value in array
"use strict"
const ps=require("prompt-sync");
const prompt=ps({sigint:true});
const stname=new Array();
//console.log(stname.length);
let choice;
let i;
let s;
do
{
   let name=prompt("Enter Name:");
   stname.push(name);
   choice=prompt("Want to continue(yes/no:  ");
}while(choice=="yes");

console.log("----------------After Push------------------------");
for(i=0;i<stname.length;i++)
{
     console.log(stname[i]);
}

console.log("----------------After Poped------------");
stname.pop()

for(i=0;i<stname.length;i++)
{
     console.log(stname[i]);
}


// s=prompt("Enter name for search:");
// console.log(stname.indexOf(s));

//console.log(stname.includes(s))
// if(stname.includes(s))
//  console.log("Searching success");
// else
// console.log("Searching not success");
 
// if(stname.indexOf(s)>=0)
//   console.log("Searching success");
// else
//    console.log("Searching not success");

// console.log("-----------------Sorted element------------------");
// // Sort 
// stname.sort();
// for(i=0;i<stname.length;i++)
// {
//      console.log(stname[i]);
// }