Re: [ferret_users] How can I check the variable

[Hiroyuki Tomita <tomita@xxxxxxxxxxxxxxxxxxxxxxxx>]

Hi Guimond,

I would like to execute different command
depending on whether or not a variable is defined.

For example, if the variable "A" is defined then I would like to  
execute "say `A`".
If the variable "A" is NOT defined then I would like to execute "say  
`B`".

How can I make it?

Hiroyuki Tomita

On 2005/08/30, at 23:16, Steve Guimond wrote:

> Hello:
>    If you would like to check whether or not a variable is defined  
> in your
> script, after you have defined a variable you could say:
>
> let test = 20
> say `test`
>
> This will return the value of test to see if it is defined the way you
> want.
>
> Steve
>
> Steve Guimond
> Research Assistant
> The Center for Ocean-Atmospheric Prediction Studies
>
> On Tue, 30 Aug 2005, Hiroyuki Tomita wrote:
>
>
> > Hello Ferreters,
> >
> > I would like to check whether the variable is defined or not in my go
> > script.
> > How can I do it?
> >
> > Thank you for your help.
> >
> > Hiroyuki Tomita