Read06.md

Functions

Definition :

A JavaScript function is a block of code designed to perform a particular task.

JavaScript Function method:

• The name of the function.
• A list of parameters to the function, enclosed in parentheses and separated by commas.
• The JavaScript statements that define the function, enclosed in curly brackets, {...}.

Function Invocation

The code inside the function will execute when "something" invokes (calls) the function:

• When an event occurs (when a user clicks a button)
• When it is invoked (called) from JavaScript code
• Automatically (self invoked)

calling The Function:

Calling the function actually performs the specified actions with the indicated parameters. For example, if you define the function square, you could call it as follows: square(5);