Function prototype

A function prototype is like telling someone what you need before you actually ask for it. Let's say you want a sandwich, you don't just say "give me a sandwich!" Instead, you first tell them what kind of sandwich you want, what bread you want, and what toppings you want. This is called a prototype.

In the same way, a function prototype is like telling the computer what kind of function you want to create before you actually create it. You tell the computer what type of input your function will take, what type of output it will produce, and what it will be called. This allows the computer to understand how to use the function correctly and avoid any errors.

Think of a function prototype as a set of instructions that tells the computer how to make the function you want. By providing a prototype, you can create all kinds of functions that do different things and work with different inputs and outputs. It's like a recipe for a function that you want to create!