import java.io.*;
import java.util.*;
public class Loops {
private int factorial;
public int fact (int n) {
if (n == 0) {
return 1;
}
else {
return n * fact (n-1);
}
}
public int fact2 (int n) {
factorial = 1;
while (n != 0) {
factorial = n * factorial;
n = n - 1;
}
return factorial;
}
}