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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; /* Console-based piggy bank */ public class Solution { public static void main(String[] args) throws Exception { BufferedReader reader = new BufferedReader(new InputStreamReader(System.in)); int sum = 0; while(true) { String s = reader.readLine(); sum +=(Integer.parseInt(s)); if (s.equals("sum")) { break; } else{ System.out.println(sum); } } } }

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hidden #10424566

Level 7

11 February 2019, 18:17

Worked . thank you

hidden #10424566

Level 7

11 February 2019, 17:44

I have tried placing : sum +=(Integer.parseInt(s)); after the if statement but still won't work. I have also placed after the else statement, either way doesn't work yet.

Guadalupe Gagnon

Level 37 , Tampa, United States

11 February 2019, 18:08

Are you putting it after the if-else statements, or did you realize that you can't output the total sum until the loop breaks? Your while loop should look like this:

while(true) {
   String s = reader.readLine();
   if (s.equals("sum")) {
      break;
   }
   sum +=(Integer.parseInt(s));
}

Guadalupe Gagnon

Level 37 , Tampa, United States

11 February 2019, 14:40

The problem is occurring on line 18. If the user enters "sum" on line 16, line 18 tries to convert it to an Integer, an exception occurs, and the program crashes. You need to check for the word "sum" before the conversion to Integer to avoid this conflict.