#include<stdio.h>
int factorial(int n);
int i,fact=1;
for(i=1;i<=n;i++){
fact=fact*i;
}
return fact;
}
int main()
{
    int num;
    printf("enter number:");
    scanf("%d",&num);
    printf("factorial of %d=%d\n",num,factorial(num));
    return 0;
}