Tagged union

A tagged union is like a box with different compartments inside it. Each compartment can hold something different, like a toy, a book, or a snack.

But, to know what's inside the compartment, there's a label on the box that tells you what's in it, like "TOY", "BOOK" or "SNACK". This label is called a "tag".

So, a tagged union is a box that can hold different things in different compartments, and each compartment has a tag to tell you what's inside. It's like a way of organizing things in a box so you can easily find what you're looking for.