State diagram

Imagine you have a toy truck and you're playing a game. You can turn the truck on, turn it off, and make it drive forward or backward. A state diagram is like a picture that shows all the different ways your toy truck can be in its different states or positions as you play with it.

Let's say you start with the truck turned off - this would be one state. Then, when you turn it on, you move to a new state. If you then make it drive forward, that would be another state. If you stop the truck from driving and make it turn off, that would be a different state again.

In a state diagram, you would draw each state as a little picture or symbol, like a circle or square. Then, you would draw arrows between the circles or squares to show how you can move from one state to another. For example, there could be an arrow that goes from the "truck turned off" state to the "truck turned on" state. There could also be an arrow that goes from the "truck driving forward" state to the "truck driving backward" state.

The state diagram helps you see all the different states your toy truck can be in and how they relate to each other. It's like a little game plan that shows you what you can do with your toy truck and how one action can lead to another. This is helpful when you're trying to understand how a system works, like a machine or computer program, because you can see all the steps and possibilities in a clear way.