Javascript Introduction

introduction

1. 1Javascript is scripting and programming language.
2. 2It is purely object based language.This means that variables, functions, and even primitive data types like numbers and strings are object,everything is object in javascript.
3. 3It is dynamically typed language , it means type of value stored in memory block is checked at runtime because of this nature we can store any type of value in variable.
4. 4It is object oriented programming language , it means we can create our own object. (It is not purely object oriented programming language)
5. 5It is interepreted language
6. 6It is synchronous language , it has single threaded architecture. Instructions get executed line by line.
7. 7It is single call stack
8. 8Mainly introduced to instruct the browser
9. 9Js helps to provide behavior and functionality to webpage and helps to develop dynamic webpage
10. 10Every browser have js engine to run js code. Therefore browser become environment to run js code.
11. 11To run Js code outside browser we just need Javascript runtime environment (Node).
12. 12Js is used to add functionality to website.