Category Archives: programming

Multiply Two Numbers without using * (Multiplication Operator)

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Write a C program to multiply two numbers without using * multiplication operator.

Given two numbers, both numbers are positive.  Write a program to multiply two numbers without using * multiplication operator.  This problem is bit tricky as we are not allowed to use multiplication operator .

We can use multiple approaches to solve this problem. In this tutorial, i am going to explain how to multiply two numbers using recursion as well as using iterative approach.

C Program to Multiply Two Numbers without using *

C Program to Multiply Two Numbers without using *

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C Program to Reverse a Linked List using Recursion

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Write a c program to reverse a linked list using recursion. Given a singly linked list, we have to write a code to reverse a linked list using recursion. This question is very important in terms of interviews.

In my previous post, I have explained C program to reverse a singly linked list. In this post, We are going to write a code to reverse a linked list using recursion.  If you are not familiar with the concept of recursion then check my previous tutorial on recursion vs iteration.

The time complexity to reverse a linked list using recursion is O(n).  →

C Program to Print Fibonacci Series using Recursion

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Write a C program to print Fibonacci Series using recursion. Given an input number, we have to write a code to print Fibonacci series up to that number using Recursion.

This question is very important in terms of technical interviews.

You can check my previous post for PHP script to print Fibonacci series. Before solving this problem, Let’s first understand what is Recursion?

What is Recursion?

In recursion, A function calls itself until the base condition is reached. Recursive code is much cleaner and shorter as compared to iterative code.
For better understanding you can check my previous post on recursion and what’s the difference between recursion and iteration.

For better understanding of  recursion concept, you can solve Objective Question on Recursion. →