TO FIND FACTORIAL OF A NUMBER IN C

//TO FIND FACTORIAL OF A NUMBER IN C
# include<stdio.h>
int main()
{
int fac,n;
int factorial(int);
printf("Enter any number:");
scanf("%d",&n);
fac=factorial(n);
printf("Factorial=%d",fac);
return 0;
}

int factorial(int x)
{
int f;
if(x==1)
return 1;
else
f=x*factorial(x-1);
return f;
}