class Factorial {
public Factorial(){
}
public int findFactorialRecursive(int number){
if (number < 0){
System.out.println("Cannot do a factorial of negative numbers.");
return -1;
}
if (number ==2 || number == 1 || number == 0){
return number;
}
return number * findFactorialRecursive(number-1);
}
public int findFactorialIterative(int number){
if (number < 0){
System.out.println("Cannot do a factorial of negative numbers.");
return -1;
}
int total =number;
while (number > 1){
number--;
total *=number;
}
return total;
}
}
class Main {
public static void main(String[] args) {
Factorial factorial = new Factorial();
System.out.println("Recursive: "+factorial.findFactorialRecursive(5));
System.out.println("Iterative: "+factorial.findFactorialIterative(5));
}
}
