Functions in C | Part 4: With Parameters & With Return | Addition & Prime | 100 Programs in C
Welcome to the 100 Programs in C series 🚀
In this video, we start exploring Type 4 Functions in C — With Parameters and With Return Value (Part 1).
These functions are the most powerful because they accept input, process logic, and return the result back to the caller.
We’ll learn this with two simple but essential programs:
1️⃣ Addition of Two Numbers
2️⃣ Check if a Number is Prime
🎯 What You’ll Learn
How to write functions that take inputs and return results.
How data flows between main() and user-defined functions.
How to use return values in decision making.
Importance of modular coding and function reusability.
🧩 Programs Covered
1️⃣ Addition of Two Numbers
Takes two parameters and returns their sum.
Demonstrates how return value is received in main().
2️⃣ Check Prime Number
Uses loops and conditionals to check if a number is prime.
Returns 1 if prime, 0 if not.
📚 Learning Outcome
By the end of this video, you’ll be able to:
✅ Write, call, and trace Type 4 functions.
✅ Understand parameter passing and return values in detail.
✅ Solve simple problems using function-based modular coding.
🏆 Series Roadmap
This video is part of the 100 Programs in C Series, where we’ll cover:
All types of functions in C
Arrays (1D, 2D, static vs dynamic)
Pointers
Strings
File Handling
Interview & GATE-level questions
📢 Next Video
👉 Type 4 (Part 2): Power of a Number & GCD of Two Numbers
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