int main()
{
int i,num;
printf("enter a number:");
scanf("%d",&num);
i=2;
while(i<=num-1)
{
if(num%i==0)
{
printf("\nNot a prime number");
break;
}
i++;
}
if(i==num)
printf("prime number");
getch();
}
{
int i,num;
printf("enter a number:");
scanf("%d",&num);
i=2;
while(i<=num-1)
{
if(num%i==0)
{
printf("\nNot a prime number");
break;
}
i++;
}
if(i==num)
printf("prime number");
getch();
}