What is a stack used for in a program?

The stack in a program is used for:

• Storing return addresses when calling functions.
• Storing local variables of functions.
• Passing parameters to functions.
• Implementing function calls at the assembly level (push/pop operations).

The stack is a memory area that operates on the LIFO (Last-In, First-Out) principle, managed by processor registers (stack pointer). Each thread of execution is allocated its own stack.