Fatorial em Java
import java.util.Scanner;
import java.util.InputMismatchException;
public class fatorial    
    public static int fat(int a) {
            if(a == 0){
            return 1;
                return a*fat(a-1);
    public static void main(String [] args) {
        Scanner sc = new Scanner(System.in);
        System.out.println("digite um número positivo para calcularmos o seu FATORIAL");
        int a = sc.nextInt();


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