Question

Introduction to Java Programing

Using Loop

• Create a simple calculator program using loop
• Ask user to input two numbers using scanner class
• Print the instruction of the menu for the calculator program
• Ask user to press 0 to Quit
• Ask user to press 1 to Add
• Ask user to press 2 to Substract
• Ask user to press 3 to Multiply
• Ask user to press 4 to Divide
• Perform correct calcuation based on user inputs and print the result
• Print error message if user enter wrong input
• Repeate the process until user quits the application.

Answer 1

Please find the below java code:

//import statements

import java.util.*;
import java.lang.*;

//main class

public class ArithmeticOperation {
   public static void main(String[] args){
   System.out.println("Arithmetic Operations");
   Scanner sc=new Scanner(System.in);
   System.out.println("please enter first number");
   int num1=sc.nextInt();// reading first number
   System.out.println("please enter second number");
   int num2=sc.nextInt();// reading second number
   int select=1;
       while(select!=0)// condition for quit
       {
       int choice=selectoperation();//calling function for options and returning the selection
       select=choice;
       performoperation(choice,num1,num2);//calling function for performing arithmetic calculation and priting the result
      
       }
      
   }
   static int selectoperation(){
       System.out.println("Please select one of the options below ");
       System.out.println("0.Quit \n1.Add \n2.Substract \n3.Mutiply \n4.Divide");
       Scanner sc=new Scanner(System.in);
       int c=sc.nextInt();
      
       return c;
   }
   static void performoperation(int d,int num1,int num2){
       switch(d){
           case 1 :
           System.out.println("Selected option is Addition");
           System.out.println("Addition:"+(num1+num2));
           break;
           case 2 :
           System.out.println("Selected option is Substraction");
           System.out.println("Substraction:"+(num1-num2));
           break;
           case 3 :
           System.out.println("Selected option is Multiplication");
           System.out.println("Multiplication:"+(num1*num2));
           break;
           case 4 :
           System.out.println("Selected option is Division");
           float div=(float)num1/(float)num2;
           System.out.println("Division:"+div);
           break;
           case 0 :
           System.out.println("Selected option is Quit");
           System.out.println("Quitting");
           break;
           default :
           System.out.println("Invalid selection");
          
       }
      
   }

}