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Jan 13 2003, 8:51 am show options |
| Newsgroups: comp.lang.perl.misc |
| From: pjack...@online.no (Peter J. Acklam) - Find messages by this author |
| Date: 13 Jan 2003 00:51:28 -0800 |
| Local: Mon, Jan 13 2003 8:51 am |
| Subject: When does (pre|post)increment happen? |
| Reply to Author | Forward | Print | View Thread | Show original | Report Abuse |
The following results confuse me. I expected
to get 0.5 and 1:
$ perl -wle '$n = 1 ; print $n / ++$n'
1
$ perl -wle '$n = 1 ; print $n / $n++'
2
In the first case, I expected to get 0.5 because
the preincrement would increment $n so the numerator
became 2, thus giving 1/2 = 0.5.
In the second case, I expected to get 1 because
the postincrement would increment $n *after* the
division was performed, thus giving 1/1 = 1.
I'd be thankful if anyone would explain...
Peter
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