System call

A system call is when your computer asks for help from someone else to do something it can't do all by itself. Let's say you want to ask for a snack. You can't reach the snack yourself, so you call for your mom or dad to help you. That's like a computer doing a system call - it's asking for help from another part of the computer to do something it can't do on its own.

When you make a system call, your computer sends a special message to the part of it that knows how to do the thing you're asking for. That message tells the computer what you want it to do - like getting you a snack. Once the other part of the computer gets your message, it does what you asked it to do and sends a message back to tell your computer that it's done.

So, system calls help your computer to do lots of different things that it couldn't do on its own, like getting data from a file or connecting to the internet. They let your computer ask for help when it needs it, and make sure that it gets what it needs to work properly.