JavaScript typeof Operator
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JavaScript typeof Operator
The typeof operator returns a string indicating the type of the unevaluated operand.
Example
HTML Online Editor
<!DOCTYPE html>
<html>
<body>
<script>
var num = 36;
var str = "hello";
var bool = true;
var arr = [1, 2, 3];
var obj = {bike: "honda", color: "red"};
var txt = "";
txt += "num : "+typeof num + "<br>";
txt += "str : "+typeof str + "<br>";
txt += "bool : "+typeof bool + "<br>";
txt += "arr : "+typeof arr + "<br>";
txt += "obj : "+typeof obj + "<br>";
document.write(txt);
</script>
</body>
</html>
Syntax
typeof operand
Return Values
The following table summarizes the possible return values of typeof.
| Type | Result |
|---|---|
| Undefined | "undefined" |
| Null | "object" |
| Boolean | "boolean" |
| String | "string" |
| Number | "number" |
| BigInt | "bigint" |
| Symbol | "symbol" |
| Function object | "function" |
| Any other object | "object" |
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