write a program to find factorial of a entered number using function.

/* write a program to find factorial of a number*/
#include<stdio.h>
int fact(int);
main()
{
int num;
printf("enter the number:");
scanf("%d",&num);
printf(" factorial=%d",fact(num));
return 0;
}
int fact(int n)
{
int i ,res=1;
if(n==0)
return 1;
else
for(i=1;i<=n;i++)
{
res*=i;
}
return res;
}