GradeChecker

public class GradeChecker {

    public static void main(String[] args) {

        Scanner scan = new Scanner(System.in);
    System.out.print("What's your grade? ");
        int grade = scan.nextInt();

        if (grade >= 90){
        System.out.println("A");
    } else if (grade >= 80 && grade <= 89) {
        System.out.println("B");
    } else if (grade >= 70 && grade <= 79) {
            System.out.println("C");
    } else {
            System.out.println("F");
    }
    }
}