How are stacks used in algorithms?

Can you explain how stacks are used in algorithms?

Sure! Stacks are data structures that follow the Last In First Out (LIFO) principle. They are used in algorithms for tasks like function calls, expression evaluation, and backtracking.

What are some common algorithms that utilize stacks?

Common algorithms that use stacks include Depth-First Search (DFS), the evaluation of postfix expressions, and backtracking algorithms like solving mazes.

How does a stack help in function calls?

In function calls, a stack keeps track of active functions. When a function is called, its context is pushed onto the stack, and when it returns, the context is popped off, allowing the program to resume where it left off.

Can you give an example of stack usage in a real-world application?

Certainly! A web browser uses a stack to manage the history of pages visited. When you navigate to a new page, the current page is pushed onto the stack, and you can go back by popping the last page off.