What is JavaScript ?

JavaScript is a dynamic computer programming language. It is lightweight and most commonly used as a part of web pages

JavaScript is a scripting language that enables you to create dynamically updating content, control multimedia, animate images, and pretty much everything else.

script :

A script or scripting language is a computer language with a series of commands within a file capable of being executed without being compiled. The best example of a client side scripting language is JavaScript.

An expression :

An expression is any valid set of literals, variables, operators, and expressions that evaluates to a single value. The value may be a number, a string, or a logical value.

JavaScript has the following kinds of expressions:

• Arithmetic: evaluates to a number .
• String: evaluates to a character string .
• Logical: evaluates to true or false .

operators :

In JavaScript operators are used to assign or compare values, perform arithmetic operations, evaluate expressions .

There are various operators supported by JavaScript:

• Arithmetic Operators
• Comparison Operators
• Logical Operators
• Assignment Operators
• String Operators