Re: booleans (corrected)

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Dear Igor,

Igor Kachan wrote:
> 
> Dear Kat:
> 
> > No, because length() gives the same error,
> > result has no value!
> 
> Try please:
> 
> ---------
> sequence s
> s={}
> ? length(s)
> 
> sequence t
> t=""
> ? length(t)
> ---------
> ...

please try this:

---------
sequence t
t={}
? t
? length(s)
---------

Have a nice day, Rolf

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