Functions

You can accomplish some surprisingly sophisticated tasks with this small number of programming concepts. You collect sets of ECMA Script statements designed to perform a specific task into functions. Think of a function as a recipe card that gives a list of ingredients and instructions which, when followed, create a specific dish. A function starts with the keyword function followed by the function name. The name should be indicative of the task that it does, and it follows the same rules that variable names do. Following the function name, in parentheses, are the parameters of the function. A parameter is extra information that the function needs when it does its task. Consider this imaginary recipe: