StudentGradeCalculator

import java. util.Scanner;

public class StudentGradeCalculator{
    public static void main(String[] args){
        Scanner scanner= new Scanner(System.in);
        System.out.println("Enter the no of subjects:");
        int numSubjects=scanner.nextInt();
        int totalMarks =0;
        for (int i= 1; i<=numSubjects; i++){
            System.out.print("Enter marks for subject" +i+"(out of 100):");
            int marks=scanner.nextInt();

            if(marks< 0 || marks>100){
                System.out.println("Invalid marks. ");
                i--;
                continue;
            }
            totalMarks +=marks;
        }
        double averagePercentage = (double)totalMarks/ numSubjects;
        String grade= calculateGrade(averagePercentage);

        System.out.println("\nResults:");
        System.out.println("TotalMarks:" + totalMarks);
        System.out.printf("Average Percentage: %.2f%%\n", averagePercentage);
        System.out.println("Grade: " + grade);
        scanner.close();
    }
    public static String calculateGrade(double averagePercentage) {
        if (averagePercentage >= 90) {
            return "A+";
        } else if (averagePercentage >= 80) {
            return "A";
        } else if (averagePercentage >= 70) {
            return "B";
        } else if (averagePercentage >= 60) {
            return "C";
        } else if (averagePercentage >= 50) {
            return "D";
        } else {
            return "F";
        }
    }
}