you use a double ampersand (&&) if you want to REUSE the variable value without prompting the user to input the value each time.

so, if you have '&&salary' and you put '50000', then in your script you can keep using '&&salary' and it will continue to use the '50000' that was entered at the beginning.

looks like you have '&&' below for some type of table or tablespace creation script or something like that ...

hope that helps.

- Magnus