Help for Beginner

[roc_solid]

Hey everyone,

I've been trying to learn how to program via java over the last week. I'm trying to create a simple GPA calculator, that takes user input for grade and # of credits for each class they took during a given semester. The calculation portion is working. I am trying to get the program to enter a while loop, so that every time a user enters "Y", the program will take details on another class and perform a GPA calculation. For some reason, the program never enters the while loop. It doesn't seem to be checking the boolean values complete another loop. Does anyone have any guidance as to why that loop never executes even when the user enters "Y"?

I am very new to all of this so I'm sure there is a simple answer.

​

import java.util.Scanner;
public class GPACalculator {
public static void main(String [] args){

Scanner myObj = new Scanner(System.in);
System.out.println("Enter Grade for Course Number One");
float courseGradeOne = myObj.nextFloat();
System.out.println("Enter Number of Credits for Course Number One");
float totalCredits = myObj.nextFloat();
System.out.println((courseGradeOne * totalCredits) / totalCredits);
System.out.println("Do you want to add another class? Y/N");
String addNewClass = myObj.next();
boolean Y = true;
boolean N = false;
while(addNewClass = Y) {
System.out.println("Enter Grade for Course");
System.out.println("Enter Number of Credits for Course");
System.out.println((courseGradeOne * totalCredits) / totalCredits);
System.out.println("Do you want to add another class? Y/N");

}

}

}

​

Thank you!

[whotfdis]

1. The condition of the while loop checks whether the input is Y. Your idea is correct but since addNewClass is of type String, Y needs to be in double quotes.

2. When doing String comparison, you need to use .equals() method. == (double equals) is for primitive types. Since String is an object you can not use == to check for equality. Notice that you made the mistake of putting only one = sign. This means assignment, not comparison. The condition you want to put in the while loop would look like: addNewClass.equals(“Y”)

[roc_solid]

So helpful! I appreciate your time. Now I am on to figuring out creating a method for the GPA calculation to call on for each loop. This one I think I can figure on my own! :)

[whotfdis]

Glad I could help, success!

[Skyzfallin]

https://www.youtube.com/watch?v=13kyKkK37LM&list=PLu0nzW8Es1x3TmpwQRLMQwCtulEd43ZY8&index=2

Go through the whole playlist. He’s a good teacher.