The compiler goes crazy and is not loving my Scanner class. And probably my code is bad as well.

Question about the task

Arithmetic mean

Java Syntax, Level 5, Lesson 5

Resolved

Could use some help here !

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; import java.io.*; import java.util.stream.*; public class Solution { public static void main(String[] args) throws Exception { Scanner input = new Scanner(System.in); int num1 = input.nextInt(); int num2 = input.nextInt(); int num3 = input.nextInt(); int num4 = input.nextInt(); int num5 = input.nextInt(); int num6 = input.nextInt(); int [] nums = {num1, num2, num3, num4, num5, num6}; int sum = IntStream.of(nums).sum(); System.out.println("The sum is " + sum); int aritMean = sum / nums.length; for (int i = 0; i < nums.length; i++) { if (nums[i] == -1) { aritMean = sum / nums[i]; break; } } System.out.println(aritMean); } }

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Agent Smith

Level 38

11 August 2020, 16:52

The main problem here is that you ask for user input exactly 6 times. But this task is about taking user input as many times, as user wants, until he enters -1. Try using the while construct, provided in the task description. Also, you can do it without using arrays, it is just over complicating things.