Function block diagram

A function block diagram is like playing with Legos. You have different blocks with different functions, like a block that adds numbers or a block that compares numbers. You can put these blocks together in different ways to create a big structure that does something cool, like controlling a toy robot or turning on a light switch.

Each block has inputs and outputs. Inputs are like putting something in, and outputs are like getting something out. For example, you can put two numbers into an adding block, and it will give you the answer as an output. You can connect multiple blocks together using arrows to show which block is feeding into another.

Think of a function block diagram like building a puzzle. Each block is a puzzle piece, and you need to put them together in the right way to get the result you want. It's like magic!