What is statefulness?

Statefulness is when something remembers what happened before, so it can act differently now.

Imagine you have a toys box that knows whether you put your favorite toy in or took it out. If you put your dinosaur in the box, and then come back later, the box still remembers your dinosaur is inside, that’s statefulness.

Think of a door that says “Welcome Back!” when you come home after school. It remembers you left earlier. That’s like having memory in something, it keeps track of what happened before, so it can greet you differently now.

Your backpack is another example of statefulness. When you put your lunch inside, it knows it has a lunch. Later, when you take out your snack, the backpack still knows there was a lunch, unless you took everything out! It’s like having a little helper that keeps track for you.

So, statefulness is just something that remembers what happened before, like your toys box or your friendly door.