http://www.perlmonks.org?node_id=615278


in reply to Doubt in the result which I got from (In|De)crement operators

Right out of perlop:

Note that just as in C, Perl doesn’t define when the variable is incremented or decremented. You just know it will be done sometime before or after the value is returned. This also means that modifying a variable twice in the same statement will lead to undefined behaviour. Avoid statements like: $i = $i ++; print ++ $i + $i ++;

regards,
tomte

An intellectual is someone whose mind watches itself.
-- Albert Camus