rohankumar11.Q3.c

#include<stdio.h>
int main()
{

int n,i,p=0;
    printf("Enter a positive integer: ");
    scanf("%d", &n);
    for(i=2;i<=n/2;++i)
    {

        if(n%i==0)
        {
            p=1;
            break;
        }
    }
    if(n==1)
    {
      printf("1 is not a prime number");
    }
    else
    {
        if(p==0)
          printf("%d is a prime number.", n);
        else
          printf("%d is not a prime number.", n);
    }

    return 0;
}