HELP MEEE

Question about the task

Adding

Java Syntax, Level 4, Lesson 16

Resolved

What is wrong with my code? :'(

Use the keyboard to enter numbers.
If the user enters -1, display the sum of all entered numbers and end the program.
-1 should be included in the sum.

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 should read the numbers from the keyboard.
If the user enters -1, the program should display the sum of all entered numbers and then end.
The program must calculate and display the sum of the entered numbers.
The program must use a for loop or a while loop.

package com.codegym.task.task04.task0442; /* Adding */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { //write your code here int n; int sum=0; BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); String number = reader.readLine(); int a = Integer.parseInt(number); while(a!=-1){ String temp = reader.readLine(); n = Integer.parseInt(temp); sum = sum + n; if(a==-1) sum = sum - 1; System.out.println(sum); break; } } }

Comments (11)

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Aleksander

Level 6 , Slupsk, Poland

17 April 2020, 17:10

package com.codegym.task.task04.task0442; /* Adding */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int suma = 0; while(true){ int number = Integer.parseInt(reader.readLine()); suma += number; if(number == -1) break; } System.out.println(suma); } }

Ryan Ceasar Borromeo

Level 7 , Makati, Philippines

22 March 2020, 02:43

This will work

package com.codegym.task.task04.task0442;


/*
Adding

*/

import java.io.*;
import java.util.Scanner;

public class Solution {
    public static void main(String[] args) throws Exception {
        //write your code here
        Scanner scanner = new Scanner(System.in);
        int sum = 0;

        while(true)
        {
            int num = scanner.nextInt();
            sum += num;

            if(num == -1)
            {
             break;
            }
        }

        System.out.println(sum);
    }
}

Corto

Level 15 , Dublin, Ireland

12 August 2019, 17:32

package com.codegym.task.task04.task0442;


/*
Adding

*/

import java.io.*;

public class Solution {



    public static void main(String[] args) throws Exception {

        int n =0;
        int sum=0;
        BufferedReader reader =
        new BufferedReader(new InputStreamReader(System.in));

        while(n!=-1){
            String temp = reader.readLine();
            n = Integer.parseInt(temp);
            sum = sum + n;
            if(n==-1)

              break;

       }
       System.out.println(sum);
    }
}

Jacqueline Lim

Level 9 , Makati, Philippines

23 September 2018, 05:15

I finally got it! Thank you! :))

Tayyab Mubeen

Level 16 , Lahore, Pakistan

23 September 2018, 07:22

please mark it as resolved

vishnu

Level 5 , Rayachoti, India

16 October 2018, 01:55

i have got error same like you. can you help me please

Jacqueline Lim

Level 9 , Makati, Philippines

16 October 2018, 07:09

Honestly, I did some major changes. Anyways, with regards to my code above, I initialized int n as 0 so "int n = 0". Then, I removed [String number = reader.readLine(); int a = Integer.parseInt(number);]. After that, I changed "a" to "n", and removed "-1" in the eqaution "sum = sum -1" so it should be "sum=sum"