#include <stdio.h>
#include<conio.h>
void main()
{
int n, i, fact=1;
clrscr();
printf("Enter a Number\n ");
scanf("%d", &n);
if (n>0)
{
for (i = 1; i <= n; ++i)
{
fact *= i;
}
printf("Factorial of %d = %d", n, fact);
}
else
{
printf("Entered Number is Negative");
}
getch();
}
Output
Enter a Number
-5
Entered Number is Negative

