I am unable to get the sum of n numbers. Can anyone give me an advice what to do?

Question about the task

Console-based piggy bank

Java Syntax, Level 5, Lesson 12

Resolved

The print statement prints each number, but does not add them up although it should

int total =+ n;

Use the keyboard to enter numbers and calculate their sum until the user enters the word "sum".
Display the resulting sum on the screen.

Hint: to read from the keyboard until the string 'exit' is input, do this:

BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in));
while (true)
{
	String s = buffer.readLine();
	if (s.equals("exit"))
		break;
}

Requirements:

The program must read data from the keyboard.
The program should stop reading data from the keyboard after the user enters the word "sum" in lowercase letters and presses Enter.
The program should work correctly if the user enters one number and the word "sum".
The program should work correctly if the user enters two numbers and the word "sum".
The program should work correctly if the user enters more than two numbers and the word "sum".
The program should display text on the screen.

package com.codegym.task.task05.task0529; import java.io.BufferedReader; import java.io.InputStreamReader; public class Solution { public static void main(String[] args) throws Exception { BufferedReader buffer = new BufferedReader(new InputStreamReader(System.in)); while (true) { String s = buffer.readLine(); if (s.equals("sum")){ break; } else { int n = Integer.parseInt(s); int total =+ n; System.out.println(total);} } } }

Comments (4)

Popular
New
Old

You must be signed in to leave a comment

Michael

Level 10 , Dresden, Germany

6 January 2020, 19:18

Hello Klesk, thanks, this helps a lot. You have pinned down 2 of my mistakes. I have followed your advice and now the value of n adds up. I hope I can figure out the rest. Thanks again!

Michael

Level 10 , Dresden, Germany

6 January 2020, 17:33

Many thanks for your help! But even with 'total' declared befor the while loop, it still does not store the data of the previous loop.

klesk

Level 31 , Duisburg, Germany

6 January 2020, 18:45

solution

There is a little type error. It has to be

+=

and not

=+

Also

System.out.println(total);}

should be outside the while loop like int total.

klesk

Level 31 , Duisburg, Germany

6 January 2020, 08:19

useful

You are declaring both variables n and total within the while loop, therefore they get "recreated" on every loop and lose the stored data. At least total should be declared before the while loop starts.