4.13 – Strong Number Program Using Functions | Multiple Functions in C | C Programming – New Series

Welcome to C Programming – Complete Course (New Series) by Burle Sharma.

In this class (4.13), we solve one of the most important logical programs in C programming:

✔ Write a program to accept a number and check whether the number is Strong or Not

This class is very important because the same problem is solved in multiple ways using functions.

📌 Approach Followed in This Video

👉 First, the complete program is written without using functions
👉 Then the same program is converted using:

🟢 Function with return type and parameter

After that:

👉 A separate factorial function is created
👉 Multiple functions are used in the same program

This helps students understand how complex programs are divided into smaller reusable functions.

📌 Concepts Explained in This Video

🔹 Strong number logic
🔹 Function with return type and parameter
🔹 Multiple function usage
🔹 Returning factorial from function
🔹 Reusing functions inside another program
🔹 Modular programming concept

Students clearly understand:

🟢 How to break a large problem into smaller parts
🟢 How one function can call another function
🟢 How factorial logic is reused
🟢 How structured programming improves readability

📌 Strong Number Logic Explained

A number is called a Strong Number if:

👉 Sum of factorials of all digits = Original number

Example:

🟢 145 = 1! + 4! + 5!
🟢 145 = 1 + 24 + 120
🟢 145 = 145

Therefore, 145 is a Strong Number.

📌 Structured Learning Approach

👉 Writing the expected output
👉 Solving without function first
👉 Converting into function-based approach
👉 Creating separate factorial function
👉 Performing dry run
👉 Executing the program and verifying output

🎓 What You’ll Learn in This Video

🟢 Strong number logic in C
🟢 Using multiple functions in one program
🟢 Writing reusable factorial function
🟢 Function with return type and parameter
🟢 Modular programming approach
🟢 Improving logical thinking

🧠 Key Learning Point

Breaking programs into multiple functions helps in:

✔ Better readability
✔ Easier debugging
✔ Code reusability
✔ Professional coding practice

This is a major step toward structured programming.

📌 Special Note

👉 This class is extremely important for students who want to improve:

🟢 Function concepts
🟢 Number logic
🟢 Problem-solving skills

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Видео 4.13 – Strong Number Program Using Functions | Multiple Functions in C | C Programming – New Series канала Burle Sharma (geecoding)