What is a stack? What are the two ways the stack works?

A stack is such a data structure. It creates a storage area in memory, in which the data is deposited in one order (i.e., "--push") in this area. There is an address pointer that always points to the data unit of the last data pressed into the stack, and the register that holds the address pointer is called the stack indicator. The unit that starts putting the data is called the "bottom of the stack." The data is deposited one by one, and this process is called "stack". In the process of pressing the stack, each data is pressed into the stack and placed in a subsequent cell connected to the previous unit, and the address in the stack indicator is automatically added 1. When reading this data, the number of addresses in the stack indicator is automatically reduced by 1 as the data is read from the address in the stack indicator. This process is called "pop POPs". In this way, the principle of LIFO is realized.

The most basic way to do this is to enter the stack and the stack

Last in, first out? What is the principle of access to stack data?

LIFO  or advanced post-out

What is a stack? What are the two ways the stack works?