For example, "3 2 +" is equivalent to the traditional "3+2" and "3 2 * 1 +" is equivalent to the traditional "(32)+1". See Wikipedia for more details and examples. This program to calculates the value ...

For example, you can use a stack of books to demonstrate how a stack data structure operates, or use colored balls and strings to show how a linked list is constructed.

So you see, implementing a stack in Python is a breeze. Queues. A queue is a first-in, first-out linear data structure (FIFO, pronounced “fife-o”). The only difference between a stack and a queue is ...