Main.java

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);

        System.out.print("enter student name: ");
        String name = input.nextLine();

        System.out.print("enter marks(0 - 100): ");
        int marks = input.nextInt();

        String grade;

        if (marks >= 80) {
            grade = "A";
        } else if (marks >= 60) {
            grade = "B";
        } else if (marks >= 50) {
            grade = "C";
        } else if (marks >= 40) {
            grade = "D";
        } else {
            grade = "F";
        }

        System.out.println("\nname: " + name);
        System.out.println("marks: " + marks);
        System.out.println("Grade: " + grade);
    }
}