Given two variables, is Empty of type boolean, indicating whether a class roster is empty or not, and number Of Credits of type int, containing the number of credits for a class, write an expression that evaluates to true if the class roster is empty or the class is exactly three credits.

     if(isEmpty || numOfCredits==3){

     }

Explanation:

Consider a complete java program below that prompts user for  number of credits and also asks if class roster is empty or not

import java.util.Scanner;

public class num13 {

   public static void main(String[] args) {

       boolean isEmpty = false;

       Scanner in = new Scanner(System.in);

       System.out.println("Is class Rooster Empty? Yes or No");

       String ans = in.next();

       if(ans.equalsIgnoreCase("yes")){

           isEmpty = true;

       }

       else isEmpty =false;

       System.out.println("Enter number of credits");

     int numOfCredits = in.nextInt();

     if(isEmpty||numOfCredits==3){

         System.out.println("True");

     }

     else {

         System.out.println("Not true");

     }

   }

}

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