variables in bash

[Hans <hans.ullrich@loop.de>]

Hi folks,

just an easy question:

What is the difference (if any) between the following two variables in a 
shellfile in bash:

1. mypath=/home/user1/Tools/

and $mypath

or
2. mypath="/home/user1/Tools/"

and $mypath

Is this in bash the same? Do other shells (sh, zsh, whatever) handle these two 
different?

Thanks for any answer, can be short!

Best regards

Hans