Functions

Functions are a pieces of code that execute when called.

They allow code to be written once and used many times.

Information may, or may not, be passed to the function and information may, or may not, be returned from the function.

Syntax

function name(variable1, variable2, ...)
{
  code
}

Example | No Pass | No Return

Example | No Pass | Return

Example | Pass | No Return

Example | Pass | Return

External

Mozilla Developer Network