Stack using Array Part | Stack and Queue | Data Structure Using C

TL;DR

Learn how to create a stack using arrays in C programming, including the structure, operations, and initialization.

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 last... Read More

Key Insights

• ❓ A stack is a LIFO (last in, first out) data structure.
• 🔄 To create a stack using arrays, declare a structure with an array and a counter.
• 🫰 The top variable indicates the index of the topmost element in the stack.
• ❓ A stack can be empty or underflown if the top value is -1.
• 🫷 Push and pop are the major operations on a stack.
• ✅ The empty function checks if the stack is empty.
• ❓ A stack can be initialized with an array of fixed size.

Questions & Answers

Q: How is a stack created using arrays?

A stack is created by declaring a structure called stack, which includes an array of fixed size and an integer counter called top. The array stores the values to be pushed or popped from the stack, while top indicates the index of the topmost element.

Q: What does a top value of -1 indicate?

When top is -1, it means the stack is empty or underflown, indicating that no values are stored in the array.

Q: What are the major operations on a stack?

The major operations on a stack are push and pop. Push adds a value to the top of the stack, while pop removes the topmost value from the stack.

Q: What is the purpose of the empty function?

The empty function checks whether the stack is empty or not by examining the top value. If top is -1, the stack is empty.

Summary & Key Takeaways

• A stack is a LIFO data structure created using a single-dimensional array and an integer counter called top.

• The array holds the values to be pushed or popped from the stack, while the top variable indicates the index of the topmost element.

• The stack can be empty, indicated by a top value of -1.