3.8 – Prime or Composite Number Program | C Programming – New Series

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

In this class (3.8), we write a C program to accept a number from the user and check whether the number is Prime or Composite using a for loop.

This is one of the most important logical programs in the loop chapter because it combines:

🟢 Factor logic
🟢 Conditional statements
🟢 Counting technique
🟢 Loop execution control

The explanation follows a structured learning approach:

👉 Writing the expected output
👉 Developing the logic step by step
👉 Performing the dry run
👉 Executing the program to verify the result

📌 Concept Explained in This Video

To determine whether a number is Prime or Composite:

🔹 A Prime number has exactly two factors (1 and the number itself)
🔹 A Composite number has more than two factors

Using loop and counting logic, we check how many times the number is divisible without remainder.

Based on the count:

🟢 If count == 2 → Prime
🟢 If count != 2 → Composite

The program is executed with different inputs to make the logic crystal clear.

🎓 What you’ll learn in this video

🟢 How to check Prime or Composite number in C
🟢 Using loop to count factors
🟢 Applying modulus operator (%) correctly
🟢 Using if statement with loop logic
🟢 Step-by-step dry run technique
🟢 Logical thinking improvement

🧠 Key Learning Point

Understanding the factor logic makes solving prime number problems simple and systematic.

Strong loop fundamentals make advanced number problems much easier.

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