Java - Read numbers and then read operations and then do the math

Description

Read numbers and then read operations and then do the math
Demo

import java.util.Scanner;

public class Manipulatev2 {

     public static void main(String[] args) {
          /*from w  w  w .j  av  a2  s  .  co  m*/
          Scanner input = new Scanner(System.in);

          double n1, n2;

          System.out.print("Please enter the first number:");
          n1 = input.nextDouble();

          System.out.print("Please enter the second number:");
          n2 = input.nextDouble();

          System.out.println("We support +, -, *, / and % operations");
          System.out.println("Choose 1 for +, 2 for -, 3 for *,  4 for / and 5 for %");
          
          System.out.print("Please choose the operation: ");
          int operation = input.nextInt();
          
          System.out.println("We support output types: short, int, float and double");
          System.out.println("Choose 1 for short, 2 for int, 3 for float and 4 for double");
          
          System.out.print("Please choose the output data type: ");
          int dataType = input.nextInt();
          
          double result = 0;
          
          if (operation == 1) {
               result = n1 + n2;
               System.out.println("Adding two numbers");
          } else if (operation == 2) {
               result = n1 - n2;
               System.out.println("Subtracting two numbers");
          } else if (operation == 3) {
               result = n1 * n2;
               System.out.println("Multiplying two numbers");
          } else if (operation == 4) {
               result = n1 / n2;
               System.out.println("Dividing two numbers");
          } else if (operation == 5) {
               result = n1 % n2;
               System.out.println("Remainder of two numbers");

          } else {

               System.out.println("Wrong operation type");
          }
          
          System.out.print("The result is ");
          if (dataType == 1) {
               System.out.println((short)result);
          } else if (dataType == 2) {
               System.out.println((int)result);
          } else if (dataType == 3) {
               System.out.println((float)result);
          } else if (dataType == 4) {
               System.out.println((double)result);
          } else {
               System.out.println("the wrong type to output");
          }
     }     
}