What is Js (JavaScript) ?

JavaScript is a programming language high level mainly used in Web browsers to create pages more interactive, currently being developed by Netscape Corp. and Mozilla.

The JavaScript-oriented language gaps for programmers and non-professionals, but it is growing attention and attracted the attention of professional programmers after adding new technologies such as the spread Ajax technology that led to the speed in the interaction between the server and the client.

In the beginning was the development of this language under name (Mocha), and dubbed Live-script officially during the piloted version of Netscape Navigator browsers 2.0 (Beta) in 1995 . but later changed its name to JavaScript is due to be added to support the Java language .

This change in name cause ambiguity and misunderstanding suggesting that the Java language and JavaScript linked or are alike. It is true that both possess a form similar to the language of the CIA, but the differences between the two languages widely :

1- Java needs to transfer to the byte-code . While JavaScript programs are processed as text issuers.
2- Variables in Java Tabatha type, while in JavaScript are dynamic. It means that you are at a variable in the JavaScript definition must determine the kind that can not be changed. For example, if I knew the variable "age" that gave him the number, for example, the value of "7" you can not change the number to another type (as the word "seven"). While in JavaScript you can do it.
3- Java does not support the Princess programming only the beginning of Alasdair eighth. While JavaScript Chatham from the start.

Why Study JavaScript?