Ferdi.java

import java.util.Scanner;
public class Ferdi{
    public static void main(String[] args) {
        Scanner input = new Scanner(System.in);
        int nilai;

        System.out.print("Masukkan nilai: ");
        nilai = input.nextInt();

        if(nilai >= 0 && nilai <= 100){
            if (nilai >= 90 && nilai <= 100){
                System.out.println("Nilai A");
            }
            else if(nilai >= 80 && nilai <= 89){
                System.out.println("Nilai B");
            }
            else if(nilai >= 60 && nilai <= 79){
                System.out.println("Nilai C");
            }
            else if(nilai >= 50 && nilai <= 59){
                System.out.println("Nilai D");
            }
            else{
                System.out.println("Nilai E");
            }
        }
        else{
            System.out.println("Nilai yang anda masukkan tidak valid");
        }
    }
}