j typeOf(4) code example

Example 1: javascript check type of variable var

// You can use the built-in method 'typeof' in order to check the variable datatype

//examples:

typeof "hello" // "string"

//or
var a = 1;
typeof(a);
//the output will be > 'number'

Example 2: check data type in js

var x = "Hello World";
typeof x; // "string"