How to Create a Stack Using Arrays in C

TL;DR

To create a stack using arrays in C, declare a fixed-size array for storing elements and an integer variable called 'top' to track the position of the topmost element. The top variable starts at -1 when the stack is empty and is incremented with each push operation. Use the array to manage stack operations like push and pop.

Transcript

hello dear students from this video onwards we will learn how to create stack using arrays basically in the previous four or five videos we saw how to create this stack data structure using linked list and we saw the program for doing the same in big detail now actually stack as you all know from our earlier discussion is a lifo data structure lost... Read More

Key Insights

• 🤙 A stack data structure can be created using arrays and an integer counter called top.
• 🫷 The array stores the values that are pushed onto the stack, while the top variable indicates the position of the topmost element.
• 🫷 The top variable is updated whenever a new value is pushed onto the stack.
• 😫 An empty stack is represented by setting the value of the top variable to -1.
• 🫷 The major operations on a stack are push and pop.
• 🫷 The push operation adds a new value onto the top of the stack.
• 🦛 The pop operation removes the topmost element from the stack.

Questions & Answers

Q: How can a stack be created using arrays?

To create a stack using arrays, declare an array of a fixed size and an integer counter called top. Push values onto the array and update the value of the top variable to indicate the position of the topmost element.

Q: What does the top variable represent in the stack?

The top variable in the stack represents the position or index of the topmost element in the array. It is updated whenever a new value is pushed onto the stack.

Q: How is an empty stack represented using arrays?

An empty stack is represented by setting the value of the top variable to -1. This indicates that there are no elements stored in the stack.

Q: What are the major operations on a stack?

The major operations on a stack are push and pop. Push adds a new value onto the stack, while pop removes the topmost element from the stack.

Summary & Key Takeaways

• A stack is a lifo data structure that can be created using a single dimension array and an integer counter called top.

• The array stores the values that are pushed into the stack, while the top variable indicates the position of the topmost element.

• The stack can be easily created by pushing values onto the array and updating the value of the top variable accordingly.