Loopback

Loopback means sending data from one part of a computer program to another part of the same program. It's like when you draw a picture on a piece of paper and then fold the paper in half to see the drawing on the other side. The drawing is still the same, but now it's on a different part of the paper.

In computer programs, loopback is used mainly to test if everything is working correctly. For example, if you write a program that plays a sound, you can use loopback to check if the sound is actually being played. You'll tell the program to play the sound, and then you'll use loopback to make sure that the sound is being heard by the program.

So, imagine your program is a little factory. When you use loopback, you're taking a product from the end of the assembly line and putting it back at the beginning of the assembly line. The product is still the same, but now it's at a different stage of the assembly. And by doing this, you can check if the assembly line is working correctly.