how to check the datatype of a variable in javascript code example

Example 1: javascript how to know type of variable

var foo = "Hello";
console.log(typeof foo); // string

Example 2: check data type in javascript

typeof("string"); //string
typeof(123); //number

Example 3: check data type in js

typeof("iAmAString");//This should return 'string'
//NO camelCase, as it is a JS Keyword

Example 4: check data type in js

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