Hi Michel,
You can declare (provide a type and identifier) and initialize a variable
all in a single line. However, you cannot use a variable without first
declaring it. Also, you have to initialze a variable before using it in your
program.
char option; is the declaration
option = 'C'; is the initialization
and char option='C' does both the declaration and initialization in one
line. Either way is acceptable.
Hope this helps,
Andre
On Wed, Dec 22, 2010 at 6:23 PM, Michel <michelana...@gmail.com> wrote:
> Questions 1
> What is the difference between the following 2 declaration statements?
>
> char option;
> option = 'C';
>
> and
>
> char option='C';
>
>
> Questions 2
> Why sometimes we initialize variables and sometimes we don’t?
> For example in the following program, we initialized the string name,
> but we did not initialize the string msg:
>
> 1 import javax.swing.JOptionPane;
> 2
> 3 public class GetInputFromKeyboard {
> 4
> 5 public static void main( String[] args ){
> 6 String name = "";
> 7 name=JOptionPane.showInputDialog(“Please enter your name");
> 8 String msg = "Hello " + name + "!";
> 9 JOptionPane.showMessageDialog(null, msg);
> 10 }
>
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