typeof operator
<!DOCTYPE html>
<html lang="en-US">
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<link name="favicon" type="image/x-icon" href="https://skillzam.com/uploads/system/e353194f3b7cd1b75d69c3ab88041985.png" rel="shortcut icon" />
<title>typeof operator</title>
</head>
<body>
<!--
typeof : operator is used to check which datatype is stored in a variable.
Syntax : typeof x
typeof(x)
-->
<h1>Demo: typeof() Operator </h1>
<p id="para"></p>
<!-- JavaScript code Starts here -->
<script>
/************************************************/
// typeof operator Example
//
const num = 34;
let text = "Workzam";
let largeInteger = 10n;
let isGreater = true;
let anyValue = null; // typeof() returns object type for null
let name;
document.getElementById("para").innerHTML =
"typeof(num) = " + typeof(num) + "<BR>" +
"typeof(NaN) = " + typeof(NaN) + "<BR>" +
"typeof(text) = " + typeof(text) + "<BR>" +
"typeof(largeInteger) = " + typeof(largeInteger) + "<BR>" +
"typeof(isGreater) = " + typeof(isGreater) + "<BR>" +
"typeof(anyValue) = " + typeof(anyValue) + "<BR>" +
"typeof(name) = " + typeof(name);
</script>
<!-- JavaScript code Ends here -->
</body>
</html>