how to find datatype of a variable in javsript code example

Example 1: check data type in js

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

Example 2: javascript datatypes

dataTypes = {
    Numbers = 1,2,3, 100, 3.14
    Strings = 'Hello, World' "helloworld@gmail.com
    Boolean = true / false
    Null = 'Explicitly set a variable with no Value'
    Undefined = 'For variable that have not yet been defined'
    Object = 'Complex data structures - Arrays, Dates, Literals etc'
    Symbol = 'Used with objects' // usually not needed
}