JavaScript Built-in Objects

JavaScript has several built-in or core language objects. These built-in objects operate independently of whatever page browser has loaded.  

String Object 

String is used to store zero or more characters of text within single or double quotes. String objects are used to store and manipulate text. There are various methods too which help in manipulating a string such as the trim () method, removes whitespace from both sides of a string 

Math Object 

The built-in Math object includes mathematical constants and functions. You do not need to create the Math object before using it. For example, sqrt(x), Returns the square root of a number. 

Date Object 

The date object is used to create date and time values. It is created using new keywords. There are different ways to create new date object. For example  

var currentdate= new Date(milliseconds) 

Number Object 

It helps us to work with numbers. Example of a method of Class Object is isInteger(), it determines whether the given value is an Integer or not. 

Array Object 

An array in JavaScript stores multiple values in a single variable, allowing it to hold a collection of items simultaneously. Concat() is a method which is used to join two strings and returns copy of the joined arrays.