At a loss on what's wrong with my code. Please help an idiot

#1



https://www.codecademy.com/en/courses/learn-java/projects/grades-analyzer


GradeAnalyzer.java:16: error: cannot find symbol
int average = sum / grades.size();
^
symbol: variable sum
location: class GradeAnalyzer
1 error


import java.util.ArrayList;
  
class GradeAnalyzer{
  public GradeAnalyzer(){
  }
  public int getAverage(ArrayList<Integer> grades){
    if (grades.size() < 1){
      System.out.println("Error! ArrayList is empty.");
      return 0;
    }
    else{
      int sum = 0;
      for (Integer grade : grades){
          sum = sum + grade;
    }
    }
  int average = sum / grades.size();
  System.out.println(average);
  return average;
  }

  public static void main(String[] args){
      ArrayList<Integer> myClassroom = new ArrayList<Integer>();
    myClassroom.add(98);
    myClassroom.add(92);
    myClassroom.add(88);
    myClassroom.add(75);
    myClassroom.add(61);
    myClassroom.add(89);
    myClassroom.add(95);
    GradeAnalyzer myAnalyzer = new GradeAnalyzer();
    myAnalyzer.getAverage(myClassroom);
    
  }
}

#2

Sum is defined in this scope

So it will only exist in the scope not outside of it. You are trying to use that variable outside of its scope here

that's why the compiler is complaining that it does not exist

#3

Thank you for you help!

#4

This topic was automatically closed 7 days after the last reply. New replies are no longer allowed.