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| author | Jarkko Hietaniemi <jarkko.hietaniemi@booking.com> | 2015-01-19 21:52:13 +0100 |
|---|---|---|
| committer | Karl Williamson <khw@cpan.org> | 2015-01-20 09:49:36 -0700 |
| commit | 44a465b3a06ab1f2660624ca7a8a125c739a587b (patch) | |
| tree | 14a69e9014095b096a0a88f048c8e33853d7ec00 | |
| parent | 7b5f862a8b6cc59b1bbb7a50d05b8c38fefbe1ca (diff) | |
| download | perl-44a465b3a06ab1f2660624ca7a8a125c739a587b.tar.gz | |
Mention some curious cases of **
| -rw-r--r-- | pod/perlop.pod | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/pod/perlop.pod b/pod/perlop.pod index d4b0cd102b..dc546fb0c3 100644 --- a/pod/perlop.pod +++ b/pod/perlop.pod @@ -207,6 +207,11 @@ tightly than unary minus, so -2**4 is -(2**4), not (-2)**4. (This is implemented using C's pow(3) function, which actually works on doubles internally.) +Note that certain exponentiation expressions are ill-defined: +these include C<0**0>, C<1**Inf>, and C<Inf**0>. Do not expect +any particular results from these special cases, the results +are platform-dependent. + =head2 Symbolic Unary Operators X<unary operator> X<operator, unary> |