Grading Scale in Java

Question

I have a Java assignment to make a grading scale like the one below.

 import java.util.Scanner;
public class gradeSelection {
   public static void main(String[] args){
   Scanner input = new Scanner(System.in);
   System.out.print("Enter Score: ");
   double score = input.nextDouble();
   if (score >= 90) {
        System.out.println("Your score is " + score + " which is an A");
        if ((score < 90) && (score >= 80)){
            System.out.println("Your score is " + score + " which is an B");
            if ((score < 80) && (score >= 70)){
                System.out.println("Your score is " + score + " which is an C");
                if ((score < 70) && (score >= 60)){
                    System.out.println("Your score is " + score + " which is an D");
                    if (score < 60){
                        System.out.println("Your score is " + score + " which is an E");
                    }//endif
                }//endif    
            }//endif
        }//endif
    }//endif
}
}

I can get it to work in Eclipse but it will terminate after I input a number. What am I doing wrong exactly?

Answer 1

You have to use if and else if, because if the first condition doesn't match it will exit and will not reach the nested (the other) conditions:

Try to change it like:

if (score >= 90) {
    System.out.println("Your score is " + score + " which is an A");
} else if (score >= 80){
    System.out.println("Your score is " + score + " which is an B");
}//and so on

Answer 2

It is simple, if the input is not bigger than 90, then nothing is printed. Use else ifs rather than this approach.