C Program to Find the Sum of First N Natural Numbers | For Loop & Formula | Easy Explanation

In this video, I explain how to find the sum of the first N natural numbers using C language in a clear and beginner-friendly way. I write and execute the complete C programs in VS Code using two different approaches:
1️⃣ Using a for loop
2️⃣ Using the direct mathematical formula

📘 Formula Used:
Sum = n × (n + 1) / 2

Both methods are explained step by step, so you can understand not only how the code works but also why it works.

This tutorial is perfect for beginners in C programming who want to strengthen their logic-building skills. I explain important concepts like loops, variables, arithmetic operations, user input, and output, along with the efficiency difference between loop-based and formula-based solutions.

By watching this video, you will learn:

What natural numbers are in programming

How to calculate the sum of first N natural numbers

C program using for loop

C program using direct formula

Difference between loop method and formula method

Writing, compiling, and running C programs in VS Code

Important points for exams, practicals, and interviews

This video is extremely useful for:

C programming beginners

Engineering and diploma students

BCA / MCA / CS / IT students

College lab and practical exams

Students preparing for technical interviews

If you are learning C language using VS Code and want a strong foundation in loops and mathematical logic, this video will help you a lot. Make sure to watch till the end, practice both methods yourself, and try different input values to improve your understanding.

If you found this video helpful, don’t forget to Like 👍, Share 🔄, and Subscribe 🔔 to the channel for more C programming tutorials, beginner-friendly explanations, and logic-building videos.

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