#include<stdio.h>
#include<conio.h>
void main()
{
int n=0,f=0;
printf("enter the number");
scanf("%d",&n);
f=fact(n);
printf("factorial of %d is %d",n,f);
}
int fact(int n)
{
 int f=1;
 while(n>0)
 {
   f=f*n;
   n--;
 }
return f;
}