Before we dive deep into the syntax of a loop, let’s do a demo!

We have a program that asks and checks for a pin. It uses a while loop, which will be the first type of loop we’ll learn about, to ask the user to type and enter a pin over and over again until the correct one is entered.

As a reminder, here’s how to compile and execute your code:

gcc enter_pin.c
./a.out

Note: You don’t need to understand the code yet, just how to interact with it!