如何阻止循环在Java中运行 [英] How do you stop a loop from running in Java

问题描述

如何阻止条件循环运行。例如，如果我写一个 if 语句接受0到100之间的值。如果用户输入的数字小于0或大于100，该如何停止程序。

How do you stop a conditional loop from running. For example if I write an if statement that accepts values from 0 to 100. How do stop the program if a user enters a number less then 0 or above 100.

import java.util.Scanner;
public class TestScores {
    public static void main(String[]args) {
            int numTests = 0;
            double[] grade = new double[numTests];
            double totGrades = 0;
            double average;

            Scanner keyboard = new Scanner(System.in);

            System.out.print("How many tests do you have? ");

            numTests = keyboard.nextInt();
            grade = new double[(int) numTests];
            for (int index = 0; index < grade.length; index++) {
                    System.out.print("Enter grade for Test " + (index + 1) + ": ");
                    grade[index] = keyboard.nextDouble();                               
                    if (grade[index] < 0 || grade[index]> 100) {
                            try {
                                throw new InvalidTestScore();
                            }
                catch (InvalidTestScore e) {
                                e.printStackTrace();
                            }
                    }
            }

            for (int index = 0; index < grade.length; index++) {
                    totGrades += grade[index];
            }

            average = totGrades/grade.length;
            System.out.print("The average is: " + average);

    }
}

推荐答案

你使用

break;

关键字。这会打破循环。

keyword. This breaks out of a loop.

这篇关于如何阻止循环在Java中运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！