Displaying Vim variables [duplicate]

Question

Possible Duplicate:
Get current value of a setting in Vim

I know that you can use :set to change Vim settings and that you can set up a configuration file ~/.vimrc but I'm running into some issues getting this to work with MacVim and I want to be able to display what a Vim environment variable is.

Is there a command like :show tw or something like this that will do this?

Thanks.

Answer 1

:set tw?

or if you want to know where it is set as well

:verbose set tw?

For even more setting fun

:options

Answer 2

In addition to the accepted answer you may also use :echo &tw.

This has the advantage that you can't accidentally set a boolean option by forgetting to add the ?. The disadvantage is that you cannot use this method with verbose.