Stack Program in C using an Array – Stack Tutorial Part – I

Write a stack program in C using an array. Implement a stack data structure using an Array. In this tutorial, You are going to learn about stack data structure and it’s implementation in C using an array.

C Program to Implement a Stack using Linked List

What is a Stack Data Structure?

A Stack is a Data Structure, in which insertion and deletion operations are allowed only at one end. It worked on LIFO (Last In First Out) Principle. In LIFO, an element which inserted last must be the first element to be removed.

C Program to Insert a Node at the Beginning of Linked List

Write a C program to insert a node at the beginning of linked list. In this tutorial, we create a linked list and insert a new node at the beginning/head of linked list.

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A Linked list is a linear data structure which consists a group of nodes and each node points to next node by means of a pointer. In Linked list, a node consists of two parts, a data and a pointer to next node.

Recursion Concept with Example

What is recursion and how to use recursion in programming. If you are new to programming, then recursion concept is tough to understand. In this post, i’ll explain the concept of recursion with example.

What is Recursion ?

In Recursion, function call itself repeatedly, until the base condition is reached.  It’s a much preferred way to write cleaner and shorter code for many complex problems.

Through recursion, you can reduce complex problem into smaller version.

Find Duplicate Elements in an Array – Java Program

Write a java program to find duplicate elements in an array. Given an array of integers, We have to write a code to find all duplicate elements in an array.

For example :

Input : arr = { 2, 5, 3, 1, 8, 7, 5, 3, 2 }

Output: {5, 3, 2}

In this tutorial, I am going to explain three approaches to find duplicate elements in an array. This question is also very important for technical interviews.

C Program to Swap two Numbers without using third variable

Write a c program to swap two numbers without using third variable. Given two input numbers, We have to write a code to swap two numbers without using third variable. In my previous post, I have explained a c program to swap two numbers using third variable. This question is generally asked in an interview.

Programming questions on linked list

Swap two numbers using Bitwise XOR Operator

C Program to Swap Two Numbers using Third Variable

Write a c program to swap two numbers using third variable. Given two input integers, We have to write a code to swap two numbers using a third or temporary variable.

C Program to swap two numbers without using third variable

Swap two numbers using a pointer

Swap two numbers using bitwise XOR operator

Programming questions on various topics for practice