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pavunkumar's scratchpad

by pavunkumar (Scribe)
on Aug 07, 2009 at 07:16 UTC ( #786678=scratchpad: print w/replies, xml ) Need Help??

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[ovedpo15]: how fast and a good way to print error if more than one out of three variables are defined? for example if there are $a $b $c. I want that if for example $a and $b are defined - print error (also for $a and $c or $b and $c)

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