Little help please..

Question about the task

Resolved

I don't get why this doesn't work...

Use the keyboard to enter numbers.
If the user enters -1, display the sum of all entered numbers and end the program.
-1 should be included in the sum.

Hint: one of the solutions to this problem uses the following construct:

while (true) {
    int number = read the number;
    if (check whether the number is -1)
        break;
}

Requirements:

The program should read the numbers from the keyboard.
If the user enters -1, the program should display the sum of all entered numbers and then end.
The program must calculate and display the sum of the entered numbers.
The program must use a for loop or a while loop.

package com.codegym.task.task04.task0442; /* Adding */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); while (true) { int number = Integer.parseInt(reader.readLine()); boolean isExit = number == -1; int sum = 0; if (!isExit) sum = sum + number; else if (isExit) { System.out.println(sum - 1); break; } } } }

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Guadalupe Gagnon

Level 37 , Tampa, United States

12 June 2020, 17:08

solution

try moving line 18 to line 14. Because it is there, every new loop cycle (when you enter a number not -1) the value of "sum" gets set to 0 and never carry a total sum of the numbers entered. What will occur is that the only output possible from this code is -1 when line 22 is reached. By moving the line to outside the loop it will not set sum to 0 every loop cycle and correctly keep a total sum of the entered numbers.