User input numbers not adding together

Question

I'm trying to write a program that reads an integer from the user (through the keyboard), adds 100 to it and displays the result. All I can do is get them to concatenate like 2 strings, instead of adding the numbers together. I can't understand why it won't add them.

import java.io.*;  
public class Program  { 
   public static void main(String[] args) throws IOException { 
      InputStreamReader isr = new InputStreamReader(System.in); 
      BufferedReader br = new BufferedReader(isr); 

      System.out.print("Enter some text: "); 
      String text = br.readLine();  
      int number = Integer.parseInt(text);

      System.out.println(" Your value + 100 is " + ( 100 + text));
     }
  }

is the code I am using and:

Enter some text: 66
 Your value + 100 is 10066

is what is printed on the screen.

That should be 100 + number.

Rohit Jain
– Rohit Jain

2013-10-22 14:12:34 +00:00
Commented Oct 22, 2013 at 14:12 — Rohit Jain
– Rohit Jain, Commented Oct 22, 2013 at 14:12

hexacyanide · Accepted Answer · 2013-10-22 14:12:53Z

7

You are adding the wrong variable. Use this instead:

System.out.println(" Your value + 100 is " + ( 100 + number));

answered Oct 22, 2013 at 14:12

hexacyanide

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Comments

Daniel · Accepted Answer · 2013-10-22 14:13:37Z

2

Text is the String, number an int, thus use:

System.out.println(" Your value + 100 is " + ( 100 + number));

For Strings + concatenates.

answered Oct 22, 2013 at 14:13

Daniel

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Comments

neoeahit · Accepted Answer · 2013-10-22 14:14:40Z

1

int number = Integer.parseInt(text) + 100;

 System.out.println(" Your value + 100 is " + ( number));

or

System.out.println(" Your value + 100 is " + ( 100 + number));

For a string "+" works to concatenate , i.e append the string together :)

answered Oct 22, 2013 at 14:14

neoeahit

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