## Question 1:¶

  1 2 3 4 5 6 7 8 9 10 public class QuestionOne { public static void main(String[] args) { //Display some messages on the console System.out.println("Hello World!"); System.out.println("It is very nice to meet you."); System.out.println("This is one of my first Java programs."); } } 

## Question 2:¶

  1 2 3 4 5 6 7 8 9 10 11 12 public class QuestionTwo { public static void main(String[] args) { //Display message Robot on the console System.out.println("RRRRR OOO BBBBB OOO TTTTT"); System.out.println(" R R O O B B O O T"); System.out.println(" RRRR O O BBBBB O O T"); System.out.println(" R R O O B B O O T"); System.out.println("RR R OOO BBBBB OOO T"); } } 

## Question 3:¶

  1 2 3 4 5 6 7 8 9 10 11 12 13 public class QuestionThree { public static void main(String[] args) { //Display a table on the console System.out.println("x x^2 x^3 x^4"); System.out.println("1 1 1 1"); System.out.println("2 4 8 16"); System.out.println("3 9 27 81"); System.out.println("4 16 64 256"); System.out.println("5 25 125 625"); } } 

## Question 4:¶

 1 2 3 4 5 6 7 8 9 public class QuestionFour { public static void main(String[] args) { //Display some math on the console System.out.print("1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = "); System.out.println(1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9); } } 

Output

1 + 2 + 3 + 4 + 5 + 6 + 7 + 8 + 9 = 45


## Question 5:¶

 1 2 3 4 5 6 7 8 public class QuestionFive { public static void main(String[] args) { //Display some math on the console System.out.println((10.6 * 4.0 - 3.2 * 1.0) / (20.6 - 1.8)); } } 

Output

2.085106382978723


## Question Six¶

 1 2 3 4 5 6 7 8 9 public class QuestionSix { public static void main(String[] args) { //Display some math on the console System.out.print((9.0 / 5.0) * 30 + 32); System.out.println("°F"); } } 

Output

86°F


Important

If you got 62°F as your answer there is a logic error in your code. In Java $$$$\frac{9}{5}$$$$ would result in 1. This is due to integer division. Integers do not allow decimal points. $$$$\frac{9}{5}$$$$ should be 1.8 but the result is 1 as .8 is discarded. To eliminate integer division we add .0 to the integer as shown in the answer.

## Challenge Question¶

  1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.edu.firstproject; import java.util.Scanner; /** * * @author james */ public class ChallengeQuestion { public static void main(String[] args) { Scanner input = new Scanner(System.in); System.out.print("Enter the temperature to convert in °C: "); double temp = input.nextDouble(); System.out.println(temp + "°C is equal to " + ((9.0 / 5.0) * temp + 32) + "°F"); } } 

Example Output

Enter the temperature to covert in °C: 21.5
21.5°C is equal to 70.7°F