📜 Description:
In this blog post, we’ll explore a straightforward C program that takes an integer as input and returns its reverse. This basic program demonstrates fundamental concepts such as loops and modulus operations, making it a great exercise for beginners learning C programming.
🛠️ Code Explanation:
The given C program reads an integer from the user, reverses its digits, and then displays the reversed number. The program uses a while loop to extract each digit from the number and constructs the reverse number by appending these digits in reverse order.
Here’s the code:
#include<stdio.h>
int main(){
int n, s;
s = 0;
printf("Enter a number: ");
scanf("%d", &n);
while (n > 0){
s = s * 10 + n % 10;
n = n / 10;
}
printf("Reverse of the number is %d", s);
return 0;
}
🎯 Examples and Outputs:
Example 1:
- Input: 1234
- Process:
- Start with
n = 1234ands = 0. - First iteration:
s = 0 * 10 + 4 = 4,n = 123. - Second iteration:
s = 4 * 10 + 3 = 43,n = 12. - Third iteration:
s = 43 * 10 + 2 = 432,n = 1. - Fourth iteration:
s = 432 * 10 + 1 = 4321,n = 0.
- Start with
- Output: Reverse of the number is 4321.
Example 2:
- Input: 98765
- Process:
- Start with
n = 98765ands = 0. - First iteration:
s = 0 * 10 + 5 = 5,n = 9876. - Second iteration:
s = 5 * 10 + 6 = 56,n = 987. - Third iteration:
s = 56 * 10 + 7 = 567,n = 98. - Fourth iteration:
s = 567 * 10 + 8 = 5678,n = 9. - Fifth iteration:
s = 5678 * 10 + 9 = 56789,n = 0.
- Start with
- Output: Reverse of the number is 56789.
🌟 Conclusion:
This simple program is a great introduction to working with loops and mathematical operations in C. By reversing the digits of a number, you not only gain a better understanding of control structures but also practice manipulating integers at a basic level.
