<!DOCTYPE html>
<html>
<body>
<h2>JavaScript typeof</h2>
<p>The typeof operator returns the type of a variable or an expression.</p>
<p id="demo"></p>
<script>
var a="hai";
var b=4;
var c;
var d=null;
document.getElementById("demo").innerHTML =
typeof a +' a=hai'+'<br>'+
typeof d +' d=null is treated as object'+'<br>'+
typeof b +' b=4'+'<br>'+ typeof c +' just var c'+'<br>'+
typeof true +' typeof true'+'<br>'+
typeof [1,2,3,4] +' typeof [1,2,3,4] '+'<br>'+
typeof {name:'john', age:34} + '<br>'+
typeof function myFunc(){}+' typeof function myFunc(){} '+'<br>'+
(null === undefined) + "<br>" +
(null == undefined);
</script>
</body>
</html>
<!--
10 == Equal x == y
10 === Strict equal x === y
10 != Unequal x != y
10 !== Strict unequal x !== y
-->
<html>
<body>
<h2>JavaScript typeof</h2>
<p>The typeof operator returns the type of a variable or an expression.</p>
<p id="demo"></p>
<script>
var a="hai";
var b=4;
var c;
var d=null;
document.getElementById("demo").innerHTML =
typeof a +' a=hai'+'<br>'+
typeof d +' d=null is treated as object'+'<br>'+
typeof b +' b=4'+'<br>'+ typeof c +' just var c'+'<br>'+
typeof true +' typeof true'+'<br>'+
typeof [1,2,3,4] +' typeof [1,2,3,4] '+'<br>'+
typeof {name:'john', age:34} + '<br>'+
typeof function myFunc(){}+' typeof function myFunc(){} '+'<br>'+
(null === undefined) + "<br>" +
(null == undefined);
</script>
</body>
</html>
<!--
10 == Equal x == y
10 === Strict equal x === y
10 != Unequal x != y
10 !== Strict unequal x !== y
-->
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