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Call stack

Call stack

Call stack definition

In computer science, a call stack is an important mechanism that helps computers manage their tasks while running a program. It’s sort of like a structured list, similar to a checklist. Using a call stack, the computer can keep track of its current position within the program and know what the next step is. As the computer completes each step, it adds new tasks to the stack, moving on to the next one until the job’s done. The highly systematic approach helps ensure the computer follows the sequence of steps and keeps things organized.

See also: dual-stack network

How does a call stack work?

1. When a computer begins running a software program or application, it creates an empty call stack.
2. As the program runs, it encounters commands or functions to perform. Each time it comes across one, it adds it to the top of the call stack.
3. When the command is done, it gets removed from the top of the call stack.
4. The computer then moves to the next command on the stack, repeating the process.
5. The call stack keeps track of where the program is and what it needs to do next, keeping everything running in the correct order.
6. Once the program is complete, the call stack becomes empty again.