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  1. #include <stdio.h>
  2. int isprime(int n);
  3. int main() 
  4. {
  5. 	int n;
  6. 	printf ("enter the no.\n");
  7. 	scanf ("%d",&n);
  8. 	if (isprime(n)==1)
  9. 	printf("no. is prime");
  10. 	else 
  11. 	printf("no. is not prime");
  12. 	return 0;
  13. }
  14. int (isprime(int n))
  15. {
  16. 	int i;
  17. 	for (i=2;i<n/2;i++)
  18. 	{
  19. 	if (n%i==0)
  20. 	return 0;
  21. 	else
  22. 	return 1;
  23. 	}
  24. }
Success #stdin #stdout 0s 9424KB
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enter the no.
no. is not prime
https://ideone.com/StcUJv
language:
C (gcc 8.3)
created:
4 years ago
visibility:
public

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