#NOT OK
print "OK\n" if ($test =~ /[753]/);

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I think you were on the right track with why the last one wasn't good. Try with any of the following input, and you'll see why: 50, 72, 39, 256. You want to anchor your regexes when testing for equality:

print "OK\n" if ($test =~ /^[753]$/);

Update: I can't spell.

In reply to Re: IF and some conditions by jhourcle
in thread IF and some conditions by uksza

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