Data Types in JavaScript - JavaScript Tutorial 14
Notes for You:: Data Types in JavaScript - JavaScript Tutorial 14
Data type:
The name itself indicating, data type means type of data.
JavaScript typeof operator:
is a special operator, used to display the type of data.
Syntax:
typeof data;
where
data can be a data value, variable name or constant name
Example Code:
<script type="text/javascript">
var playerScore= 10;
document.write(playerScore); // 10
document.write(typeof playerScore); // number
var playerName= "Manju";
document.write(playerName); // Manju
document.write(typeof playerName); // string
var isGameOver = true;
document.write(isGameOver); // true
document.write(typeof isGameOver); // boolean
var speed = undefined;
document.write(speed); // undefined
document.write(typeof speed); // undefined
var rollNumbers = [10,20,30];
document.write(rollNumbers); // 10,20,30
document.write(typeof rollNumbers); // object
var point = {x:10,y:10};
document.write(point); // [object Object]
document.write(typeof point); // object
var point=null;
document.write(point); // null
document.write(typeof point); // object
</script>
Note:
replace < with less-than symbol
replace > with greater-than symbol
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