“Java Basic Classic Program 100 examples” (02) given a percentage score output the corresponding grade

Small knowledge, big challenge! This article is participating in the creation activity of “Essential Tips for Programmers”

package csdncom.tt;

import java.util.Scanner;

/** * Created by Administrator on 2021/10/30. */
public class LeapYear {
		public static void main(String[] args){ 
			System.out.println("Please enter a score");
		// Define the input fraction as "mark", and the fraction will have decimals
		   double mark;
		Scanner scanner = new Scanner(System.in); 
		mark = scanner.nextDouble();
		// Determine if there are any input errors.
		if(mark<0||mark>100){
			System.out.println("Wrong input! "); System.exit(0);
		}
		/* The grade of judging scores is A with 90 points above, B with 80 to 89 points, C with 70 to 79 points, D with 60 to 69 points, and E with 60 points below */
		if (mark>=90) {
			System.out.println("this mark is grade \'A\' ");  
		}else if (mark>=80) { 
			System.out.println("this mark is grade \'B\' ");
		}else if (mark>=70) {
			System.out.println("this mark is grade \'C\' "); 
		}else if (mark>=60) {
			System.out.println("this mark is grade \'D\' "); 
			
		}else	System.out.println("this mark is grade \'E\' "); }}Copy the code