[Java] 7. 반복문_6.while문

-1의 값이 입력될 때까지 합계 계산하기

package ex03;

import java.util.Scanner;

public class GetSum {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int sum = 0;

        // 1,2,3,4,5,6,7,8,9,10
        while (true) {
            // 1. 숫자받기
            int value = sc.nextInt();

            // 2. 종료신호 확인하기
            if (value == -1) {
                break;
            }

            // 3. 값 누적하기
            sum = sum + value;
        }
        System.out.println("누적값 : " + sum);
    }
}

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=51701:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex03.Averager
점수를 입력하시오: 
10
점수를 입력하시오: 
20
점수를 입력하시오: 
30
점수를 입력하시오: 
40
점수를 입력하시오: 
-1
평균은 25

Process finished with exit code 0

점수 평균 구하기

package ex03;

import java.util.Scanner;

public class Averager {
    public static void main(String[] args) {
        int total = 0, count = 0;
        Scanner sc = new Scanner(System.in);

        while (true) {
            System.out.println("점수를 입력하시오: ");
            int grade = sc.nextInt();
            if (grade < 0) break;
            total += grade;
            count++;
        }
        System.out.println("평균은 " + total / count);
    }
}

C:\workspace\tools\jdk-21\bin\java.exe "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\lib\idea_rt.jar=51728:C:\Program Files\JetBrains\IntelliJ IDEA 2024.3.2.1\bin" -Dfile.encoding=UTF-8 -Dsun.stdout.encoding=UTF-8 -Dsun.stderr.encoding=UTF-8 -classpath C:\workspace\java_lec\study\out\production\study ex03.GetSum
1
2
3
4
-1
누적값 : 10

Process finished with exit code 0