import javax.swing.JOptionPane;

public class Example2{

public static void main(String args[]){

int n;

String inputNumber;

inputNumber = JOptionPane.showInputDialog("Number:");

n=Integer.parseInt(inputNumber);

for(int i=2;i<=n/2; i++)

{

if (n%i==0)

{

System.out.println("It is not a prime number");

System.exit(0);

}

}

System.out.println("It is a prime number");

System.exit(0);

}

}

#include
#include
int prime(int);
int main()
{
  int num;
  char ans;
  clrscr();
  while(1) {
     printf("\n Enter a number:") ;
     scanf("%d", &num);
     if(prime(num))
 printf("\n Number %d is prime.", num);
     else
 printf("\n Number %d is  not prime.", num);
     printf("\n Do you want to continue?(y/n):");
     ans = getche();
     if(ans != 'y')
  break;
  }// end of while
  getch();
  return 0;
}
//********************
int prime(int num)
{
  int i, temp = 1;
  for(i = 2; (i <= num / 2)  && temp ; i++)
      if(num % i == 0)
  temp = 0;
  return temp;
}

#include
#include
int main()
{
   long int fact ;
   int i, num ;
   clrscr();
   for(;;) {
     printf("\nType a number :") ;
     scanf("%d",&num) ;
     fact = 1 ;
     for(i = 1; i<= num; i++)
  fact *= i ;
     printf("Factorial is :%ld", fact);
   }
 }

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