Solution Review: Assign Grades to Students

class GradingSystem 
{
    public static void main(String args[]) 
    {
        System.out.println(assignGrades(75));
    }
    // Function assigning the grades
    public static char assignGrades(double score) 
    {
        if (score == 100) 
        {
            System.out.println("Superb");
            return 'A';
        }
        else if (score >= 90) 
        {
            System.out.println("Excelent");
            return 'A';
        }
        else if (score >= 80) 
        {
            System.out.println("Very Good");
            return 'B';
        }
        else if (score >= 70) 
        {
            System.out.println("Good");
            return 'C';
        }
        else if (score >= 60) 
        {
            System.out.println("Work Hard");
            return 'D';
        }
        else 
        {
            System.out.println("Fail");
            return 'F';
        }
    }
}