#include<stdio.h>
#include<conio.h>
void main()
{
int no,factorial;
int fact (int no);
clrscr();
printf("Enter a number:");
scanf("%d",&no);
factorial=fact(no);
printf("Factorial=%d",factorial);
getch();
 }
int fact (int no)
{
int i,ans;
for(i=1,ans=1;i<=no;i++)
{
    ans=ans*i;
}
return ans;
}