On 09/18/2010 08:31 PM, kcrisman wrote:
> On Sep 18, 12:52 pm, "ma...@mendelu.cz" <ma...@mendelu.cz> wrote:
>> x does not need declaration, it is declared automatically
>
> It's still good practice to do it, just in case x was defined in some
> other way earlier in the session :)
Or with 'sage -c', where x is not currently pre-defined:
$ sage -c "print x"
Traceback (most recent call last):
File "/home/mpatel/apps/sage/local/bin/sage-eval", line 15, in <module>
eval(compile(s,'<cmdline>','exec'))
File "<cmdline>", line 1, in <module>
NameError: name 'x' is not defined
$ sage -c "var('x'); print x"
x
$
This is with version 4.5.3.
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