Double-ended queue

A double-ended queue is like a line of people waiting for ice cream. Imagine you have a friend holding up the front of the line by deciding what flavor to pick. But then, you have another friend who wants to join the line from the back. Instead of making everyone move up and squeeze in, your friend can just hop in right at the back of the line.

A double-ended queue is just like that! It's a line of data where you can add or remove things from both ends. Instead of just adding or removing things from one end, you have the ability to do it from both ends. This makes it really helpful for when you need to organize data in a certain way, like when you want to shuffle a deck of cards.

So, a double-ended queue is like a line where you can add and remove people from both the front and back. It's helpful when you need to organize things in a certain way, like when you're playing a game or working on a project.