please check my code

Question about the task

Arithmetic mean

Java Syntax, Level 5, Lesson 5

Under discussion

Hi, can anyone give me a hint?

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; import java.util.Scanner; /* Arithmetic mean */ public class Solution { public static void main(String[] args) throws Exception { Scanner scanner = new Scanner(System.in); double sum = 0; double count = 0; double mean = 0; while (true){ double a = scanner.nextDouble(); if (a != -1){ sum = sum + a; count ++; } else if (count > 0){ mean = sum/count; } break; } System.out.println(mean); //write your code here } }

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Anthony Chalk

Level 30 , London, United Kingdom

15 December 2019, 15:55

since you wrote break; outside of the if/else block, your code will only read one number from the keyboard. Instead try: if(a == 0) break; else{ sum += a; count++; }