SHOW:
|
|
- or go back to the newest paste.
| 1 | /* C program to check whether a number is prime or not. */ | |
| 2 | #include <stdio.h> | |
| 3 | int main() | |
| 4 | {
| |
| 5 | int n, i, flag=0; | |
| 6 | printf("Enter a positive integer: ");
| |
| 7 | scanf("%d",&n);
| |
| 8 | for(i=2;i<=n/2;++i) | |
| 9 | {
| |
| 10 | if(n%i==0) | |
| 11 | {
| |
| 12 | flag=1; | |
| 13 | break; | |
| 14 | } | |
| 15 | } | |
| 16 | if (flag==0) | |
| 17 | printf("%d is a prime number.",n);
| |
| 18 | else | |
| 19 | printf("%d is not a prime number.",n);
| |
| 20 | return 0; | |
| 21 | } |
