The Foundation

Functions are the main " subroutines " in JavaScript. They allow us to avoid code duplication.

Syntax

function name(parameters) {
  ...body...
}

Calling a Function

function showMessage() {
  alert('Hello everyone!');
}

showMessage(); // Call
showMessage(); // Another call

Note

The main feature of a Function Declaration is that it can be called BEFORE it is defined in the code. This is possible due to the " hoisting " mechanism.