Well for starters "0" and an empty string("") are false. Anything else is basically true.
0 # converts to "0" so it's false;
"" # is empty string so it's false;
"0.0" # not "0" or "" so it's true
0.0 # computes to 0 and is then converted to "0" so false
undef # evaluates to "" so it's false -- note, you may get a warni
+ng "use of uninitialized value" if you are using -w
2-3+1 # computes to 0 which is converted to "0" so it is false
-
Are you posting in the right place? Check out Where do I post X? to know for sure.
-
Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
<code> <a> <b> <big>
<blockquote> <br /> <dd>
<dl> <dt> <em> <font>
<h1> <h2> <h3> <h4>
<h5> <h6> <hr /> <i>
<li> <nbsp> <ol> <p>
<small> <strike> <strong>
<sub> <sup> <table>
<td> <th> <tr> <tt>
<u> <ul>
-
Snippets of code should be wrapped in
<code> tags not
<pre> tags. In fact, <pre>
tags should generally be avoided. If they must
be used, extreme care should be
taken to ensure that their contents do not
have long lines (<70 chars), in order to prevent
horizontal scrolling (and possible janitor
intervention).
-
Want more info? How to link
or How to display code and escape characters
are good places to start.
|
