JavaScript Strings Part – 2

Program 1

// String in Java Script
"use strict"
const ps=require("prompt-sync")
const prompt=ps({sigint:true})
let str
str="This is a class of JS , This is a class of Java Script , This is a class of string in java script"
console.log(str.indexOf("class"))  // int
console.log(str.search("class"))  // int

// console.log(str.lastIndexOf("class"))  // int
// console.log(str.includes("class"))  // boolean
// console.log(str.match("class"))  // array
/*
  indexOf()
  includes()
  match()
*/

Program 2

// String in Java Script
// mutable and immutable
  let str="DataFlair"  //immutable (non change)
//  str=str.concat(" Indore MP")
str=str +" Indore MP"
  console.log(str)
  console.log(10+10)   //addition
  console.log(10.5+10.5) //addition
  console.log(true+true)//addition
  console.log("10"+10) //concat
  console.log("10"+"10") //concat

Program 3

// String in Java Script
"use strict"
const ps=require("prompt-sync")
const prompt=ps({sigint:true})

// let s=prompt("Enter Doctor Name: ")
// s=s.toUpperCase()
// //console.log(s.startsWith("DR"))
// if(s.startsWith("DR"))
//     console.log("Its valid name")
// else
// console.log("Its  Invalid name")

// let s=prompt("Enter a string: ")
// s=s.toUpperCase()
// console.log(s.endsWith("INDORE"))
//let s=prompt("Enter a string: ")
let s="This is a class of JS ,This is a class of Java Script , This is a class of string in java script"
//console.log(s.substring(10))
// s=s.replaceAll("python","Java Script")
// console.log(s)