Question

Summary

In this lab, you add a loop and the statements that make up the loop body to a Java program that is provided. When completed, the program should calculate two totals: the number of left-handed people and the number of right-handed people in your class. Your loop should execute until the user enters the character X instead of L for left-handed or R for right-handed.

The inputs for this program are as follows: R, R, R, L, L, L, R, L, R, R, L, X

Variables have been declared for you, and the input and output statements have been written.

Instructions

1. Ensure the file named LeftOrRight.java is open.

2. Write a loop and a loop body that allows you to calculate a total of left-handed and right-handed people in your class.

3. Execute the program by clicking Run and using the data listed above and verify that the output is correct.

4. // LeftOrRight.java - This program calculates the total number of left-handed and right-handed
   // students in a class.   
   // Input: L for left-handed; R for right handed; X to quit.
   // Output: Prints the number of left-handed students and the number of right-handed students.

   import java.util.Scanner;

   public class LeftOrRight
   {
      public static void main(String args[])
      {
          Scanner s = new Scanner(System.in);
          String leftOrRight = ""; // L or R for one student.
          int rightTotal = 0;   // Number of right-handed students.
          int leftTotal = 0;    // Number of left-handed students.
         
          // This is the work done in the housekeeping() method
          System.out.println("Enter L if you are left-handed, R if you are right-handed or X to quit.");
          leftOrRight = s.nextLine();

          // This is the work done in the detailLoop() method
          // Write your loop here.
         

   
          // This is the work done in the endOfJob() method  
          // Output number of left or right-handed students.  
          System.out.println("Number of left-handed students: " + leftTotal);
          System.out.println("Number of right-handed students: " + rightTotal);
          System.exit(0);
      } // End of main() method.

   } // End of LeftOrRight class.
   

Answer 1

import java.util.Scanner;

public class LeftOrRight

{
  public static void main(String args[])

  {

    Scanner s = new Scanner(System.in);

    String leftOrRight = ""; // L or R for one student.

    int rightTotal = 0; // Number of right-handed students.

    int leftTotal = 0; // Number of left-handed students.

// This is the work done in the housekeeping() method

    System.out.println("Enter L if you are left-handed, R if you are right-handed or X to quit.");

    leftOrRight = s.nextLine();

// This is the work done in the detailLoop() method

// Write your loop here.
    for(String word: leftOrRight.split(", ")){
      if(word.toUpperCase().equals("R")){
        rightTotal += 1;
      }
      else if(word.toUpperCase().equals("L")){
        leftTotal += 1;
      }
    }

// This is the work done in the endOfJob() method

// Output number of left or right-handed students.

    System.out.println("Number of left-handed students: " + leftTotal);

    System.out.println("Number of right-handed students: " + rightTotal);

    System.exit(0);

  } // End of main() method.

} // End of LeftOrRight class.