What is a Call Stack ?

Call stack often referred to as function stack, execution stack, control stack , run time stack or ' THE STACK ' is a dynamic stack data structure which holds information like addresses of active sub routines of the program which is under consideration.

Adding an entry into this stack is called winding and similarly removing an entry is called unwinding. Stack overflow may occur during memory shortage. Call stacks are usually hidden from programmers in high level programming and are given access only to certain specific functions.