5️⃣C Program to Reverse a Number (With Program and Explanation)

 

🔹 C Program to Reverse a Number

📌 Problem Statement

Write a C program to reverse a given integer number.

---

💻 C Program Code

#include <stdio.h>

int main() {
    int num, reverse = 0, remainder;

    printf("Enter a number: ");
    scanf("%d", &num);

    while (num != 0) {
        remainder = num % 10;
        reverse = reverse * 10 + remainder;
        num = num / 10;
    }

    printf("Reversed number = %d", reverse);

    return 0;
}

---

🧠 Explanation

• num stores the original number.

• remainder stores the last digit of the number.

• reverse stores the reversed number.

• The while loop:

  • Extracts the last digit using % 10

  • Appends it to reverse

  • Removes the last digit using / 10

• The loop continues until the number becomes 0.

---

🧪 Example Output

Enter a number: 1234
Reversed number = 4321

---

✅ Conclusion

This program efficiently reverses any integer number using basic arithmetic operations and loops in C.

---

📘 C Programming Series – What’s Next?

👉 In the next post of this series, we will learn how to write a C Program to Find Factorial of a Number with complete explanation and output examples. Stay tuned! 🚀