27. Program to Find Factorial of a Number

void main()
{
int n, count;
int factorial=1;
clrscr();
printf("Enter an integer: ");
scanf("%d",&n);
if ( n< 0)
{
printf("Error!!! Factorial of negative number doesn't exist.");
}
else
{
for(count=1;count<=n;++count)
{
factorial*=count;
}
printf("Factorial = %lu",factorial);
}
getch();

}