JavaScript/lec1.html at main · Anuradha0066/JavaScript · GitHub

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<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>

//Datatypes
// Number
//String
//Boolean
//undefined
//null
//Bigint
//Symbol

// let var const
// var => redeclaration and reintialization
// var a=5;
// var a=10;
// console.log(a);

// let c=10;
// c=5
// console.log(c);

// const b=6;
// console.log(b)

//undefined vs null
//undefined => value is not assigned
//null => value is declared but we cant get the what the value is

//not defined => value is declared but not assigned

//Camel Case => firstName ->this is standard method of declaration

// =  ==  ===
//= -> assignment operator
//== -> compare value
//=== -> compare value as well as data type
var a=100
var b= a==100  //== comparison
console.log(b) // true

console.log(true == " ")//false

var c=2;
console.log(typeof(typeof(a)));
console.log();


</script>

</body>
</html>