It keeps telling me I have an issue in line 10 - not sure what the issue is.

Question about the task

Arithmetic mean

Java Syntax, Level 5, Lesson 5

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It keeps telling me I have an issue in line 10 - not sure what the issue is - I am using intelliJ

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 */ public class Solution { public static void main(String[] args) throws Exception { BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(System.in)); double aCount = 0; double sum = 0; while (true){ String number = bufferedReader.readLine(); int a = Integer.parseInt(number); if(a == -1) { break; } aCount++; sum = sum + a; } double avg = sum/aCount; System.out.println(avg); } }

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Dedcom

Level 19 , Lahore, Pakistan

3 February 2019, 16:47

import these : import java.io.BufferedReader; import java.io.InputStreamReader;

bri

Level 7 , Sevilla, Spain

4 February 2019, 15:01

I did and it worked - but why? and, why haven't I needed to do that before now?

Dedcom

Level 19 , Lahore, Pakistan

4 February 2019, 15:11

you cant use BufferedReader without importing its libraries that's why you were getting the error and for your second question i would say if you were doing it in intelli j, the compiler would have warned you that you are using bufferedreader without importing its libraries.