Okay kiddo, do you know what printing means? It's like when you draw something on a piece of paper or write something with a pen. When we use the word "printf" in Unix, it means we are asking the computer to print something out for us to see.
In Unix, "printf" is a command that we use in the terminal (like a magical box where we can talk to the computer). We use it to tell the computer exactly what we want to print, and where to print it.
Let's say we want to print out the word "apple". We would type "printf 'apple' " in the terminal, and press enter. The computer would then print the word "apple" on the next line for us to see.
"printf" can also do some other cool things, like allowing us to print numbers or special characters. But it's important to make sure we type everything correctly, or the computer won't know what we want it to do.
So in summary, "printf" is a command we use in Unix to print out our words, numbers or special characters in the terminal. It's like asking a magic box to show us what we want to see.