Conditional Statement

package javaapplication2;
import java.util.Scanner;

public class JavaApplication2 {


    public static void main(String[] args) {
      int n;
      Scanner scan=new Scanner(System.in);
      n=scan.nextInt();
      if(n>80 && n<100){
          System.out.println("A+");
      }
      else if(n>70 && n<80)
      {
          System.out.println("A");
      }
      else if(n>60 && n<70)
      {
          System.out.println("A-");
      }
      else if(n>50 && n<60)
      {
          System.out.println("B");
      }
      else
      {
          System.out.println("F");
      }


    }

}