C program for prime number or not

C program for prime number or not

 C program for prime number or not

#include<stdio.h>

 main()

{

   int n, c = 2;

   printf("Enter a number to check if it is prime\n");

   scanf("%d",&n);

   for ( c = 2 ; c <= n - 1 ; c++ )

   {

      if ( n%c == 0 )

      {

         printf("%d is not prime.\n", n);

         break;

      }

   }

   if ( c == n )

      printf("%d is prime.\n", n);

   return 0;

}

C program for prime number using function

#include<stdio.h>

int check_prime(int);

main()

{

   int n, result;

   printf("Enter an integer to check whether it is prime or not.\n");

   scanf("%d",&n);

   result = check_prime(n);

   if ( result == 1 )

      printf("%d is prime.\n", n);

   else

      printf("%d is not prime.\n", n);

   return 0;

}

int check_prime(int a)

{

   int c;

   for ( c = 2 ; c <= a - 1 ; c++ )

   {

      if ( a%c == 0 )

         return 0;

   }

   if ( c == a )

      return 1;

}

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