how to use var in javascript code example

Example 1: javascript declare a variable

//choose the best for your solution
var myVariable = 22; //this can be a string or number. var is globally defined

let myVariable = 22; //this can be a string or number. let is block scoped

const myVariable = 22; //this can be a string or number. const is block scoped and can't be reassigned

Example 2: how to change a variables value in javascript

var variable = 10;

function start() {
  variable = 20;
}
console.log(variable + 20);

// Answer will be 40 since the variable was changed in the function

Example 3: variables in js

var Hello = "World";
let bool = false;
const int = 8788;

Example 4: js variables

// let & var are both editable variables:
var cow = 'moo';
let pig = 'oink';
cow = 10;
pig = 10;
// const is a permanent variable; you cannot change it.
const uncuttableGrass = '\/\/';
uncuttableGrass = '___';
// above throws an error

Example 5: variable in js

////We can define variables in 3 ways {var,let,const}/////// 
////syntax- var variable_name=value;
/////  let variable_name=value;
/////const variable_name=value;

var myfristvariable="neha jaiswal";
const mysecondvariable=80;
let mythirdvar=abc;