class Main {
public static int factorielle(int n) {
if ( n == 0 )
return 1;
else if ( n == 1 )
return 1;
else {
int result = 1;
int i = 0;
while (i < n) {
i = i + 1;
result = result * i;
}
return result;
}
}
public static void main(String[] arg) {
System.out.println(factorielle(5));
}
}
