Functions are pieces of code that when defined and used, can make your code smaller and more efficient. You can call a function multiple times and have the exact same effect each time without making your code hundreds of lines long. This makes functions very useful, as you can use a piece of code multiple times, without having to rewrite it. Some functions are already pre defined, and you can check a code library to see which ones are already pre defined. For each programming language, defining a function is different, but you can check a code library to see how to define them.

Functions are used when you want to make your code more clean and compact, and used to help you repeat code multiple times without having to type them out. This is very useful for longer codes, because it makes your code more organized and easier for other programmers to look over your code. Almost every code has some form of functions in it. It is very important to learn how to define and use functions because they can make coding a lot easier and simpler.

Guide To Coding