Friday, 10 November 2017

C program for prime number


Code:

#include

main()
{
   int n, c;

   printf("Enter a number\n");
   scanf("%d", &n);

   if ( n == 2 )
      printf("Prime number.\n");
   else
   {
       for ( c = 2 ; c <= n - 1 ; c++ )
       {
           if ( n % c == 0 )
              break;
       }
       if ( c != n )
          printf("Not prime.\n");
       else
          printf("Prime number.\n");
   }
   return 0;
}

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