Alright, let’s start with what functions actually are?

• OK, a function is a piece of code.
• A function may/may not accept input(s).
• A function may/may not return an output(s).

Why do we need functions in a program?

• Well, the Reusability of the code in a program is made possible through functions.
• The program can call these so-called functions, n - number of times.
• This showcases the best practice in a program called DRY.

DRY - Do not Repeat Yourself

• A code is said to be DRY if any given code does not repeat certain tasks.
• A function implements this just by writing once and using it whenever necessary.

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