What are the differences between stacks and queues?
Stacks and queues are both data structures used to store collections of items. A stack follows the Last In First Out (LIFO) principle, meaning the last item added is the first one to be removed. A queue, on the other hand, follows the First In First Out (FIFO) principle, where the first item added is the first one to be removed.
Can you give me examples of where I would use a stack?
Sure! Stacks are commonly used in scenarios like undo mechanisms in text editors, parsing expressions in compilers, and managing function calls in programming.
What about queues? Where are they used?
Queues are often used in scenarios like scheduling tasks in operating systems, handling requests in web servers, and managing print jobs in printers.
How do I implement a stack in Python?
You can implement a stack in Python using a list. You can use the append()
method to add items and the pop()
method to remove them.
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