C PRACTICAL / FUNCTION PRIME THAT RETURN 1 IF IT'S ARGUMENT IS PRIME AND RETURN 0 IF NOT.

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>> /* WRITE A FUNCTION PRIME THAT RETURN 1 IF IT'S ARGUMENT IS PRIME AND RETURN 0 IF NOT. */

#include<stdio.h>

#include<conio.h>

int prime();

void main()

{

   int n,x;

   clrscr();

   printf("enter any value : \n");

   scanf("%d",&n);

   x= prime(n);

      if(x==1)

  printf("no is prime : %d\n",x);

      else

  printf("no is NOT a prime : %d\n",x);

   getch();

}

 int prime(n)

 {

   int i=2, flag=0;

   for(i=2; i<n; i++)

   {

      if(n%i==0)

      {

flag=1;

break;

      }

   }

      if(flag==0)

return 1;

      else

return 2;

 }

    /*  OUTPUT  */

======================

enter any value : 

9

no is NOT a prime : 2

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