Davi-K-Silva

import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Scanner;
/**
* Class for handling simple file readings and writings.
* 
* @author Davi-K-Silva
* @version 1.2

Davi-K-Silva

import java.util.ArrayList;

public class Ecx1 {
    
    public static void main(String[] args) {
        System.out.println(fatorial(3));
        System.out.println(somatorio(3));
        System.out.println(fibo(3));
        System.out.println(somaKJ(2, 5));
        System.out.println(palindro("arara"));