Could you please help me?

Question about the task

Under discussion

What's wrong?

Use the keyboard to enter numbers, and then calculate the arithmetic mean.
If the user enters -1, display the arithmetic mean of all entered numbers and end the program.
-1 should not be included in the calculation.

Here are some examples:
a) if you enter the numbers
1
2
2
4
5
-1
then we display
2.8

b) if you enter the numbers
4
3
2
1
-1
then we display
2.5

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 must read data from the keyboard.
The program should display data on the screen.
After entering -1, the program must correctly terminate.
If you sequentially enter the numbers 1, 2, 2, 4, 5 and -1, the program should display 2.8.
If you sequentially enter the numbers -100, 0, 100, and -1, the program should display 0.0.
If you sequentially enter the numbers 1 and -1, the program should display 1.0.
The displayed result should match the task conditions for any input data.

package com.codegym.task.task05.task0507; /* Arithmetic mean */ import java.util.Scanner; public class Solution { public static void main(String[] args) throws Exception { Scanner s = new Scanner(System.in); double sum = 0; double num = 0; while (true) { double n = s.nextDouble(); if (n == -1) break; sum += n; num++; } if (sum == 0 && num > 0) System.out.println(0.0); if (sum > 0 && num > 0) System.out.println(sum / num); } }

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Oregano

Level 24 , Warsaw, Poland

13 October 2019, 20:17

I think in line 21 you meant num == 0, currently the program doesn't display anything if user enters only -1

Vesa

Level 41 , Kaliningrad, Russia

13 October 2019, 20:16

What will be displayed if you enter -100 and -1?

hidden #10536831

Level 10

14 October 2019, 02:10

Thanks. I have resolved it.