Greetings! Today, we're delving into the concept of Stacks, a fundamental data structure in computer science. A stack operates similarly to a stack of plates: you add a plate to the top (Last In) and remove it from the top (First Out). This Last-In, First-Out (LIFO) principle is the core characteristic of a stack. In TypeScript, we can implement stacks using arrays due to their ease and efficiency. This lesson will illuminate the stack data structure, its operations, and their applications in TypeScript. Are you ready to start?

To create a stack, TypeScript uses arrays. For the push operation, we use the push() method to add an element to the end of the array. For the pop operation, there is the pop() function that removes the last element, mimicking the removal of the "top" element in a stack. Here's how it looks:

In the example provided, we push "John," "Mary," and "Steve" into the stack and then pop "Steve" from the stack.

Stack operations go beyond merely push and . For instance, to verify if a stack is empty, we can use the property of the array. If it returns , the stack is empty. Conversely, if it returns a number greater than , the stack is not empty. To peek at the top element of the stack without popping it, we use the index .