Basic Java - Assignment Grading

package Assignment;

import java.util.Scanner;

public class Assignment {
    private double score = 0.0;

    public double getScore() {
        return score;
    }

    public void setScore(double score) {
        this.score = score;
    }

    public char lettergrade(){
        if (score >= 90.0){
            return 'A';
        } else if (score >= 80.0){
            return 'B';
        } else if (score >= 70.0){
            return 'C';
        } else if (score >= 60.0){
            return 'D';
        } else {
            return 'F';
        }
    }

public static void main(String[] args){
    // TODO Auto-generated method stub
    }
}