Stacks and queues, side by side

Add and remove, two different ways

A stack gives back the newest item first (like plates). A queue gives back the oldest first (like a line at a shop). Add the same items to both, then remove one and compare.

Add a few items, then remove one.

Stacks power undo, back buttons and depth-first search. Queues power print jobs and breadth-first search. See both in the maze.