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
Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
Read Where should I post X? if you're not absolutely sure you're posting in the right place.
Please read these before you post! —
Posts may use any of the Perl Monks Approved HTML tags:
Outside of code tags, you may need to use entities for some characters:
- a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
Link using PerlMonks shortcuts! What shortcuts can I use for linking?
See Writeup Formatting Tips and other pages linked from there for more info.
| & || & |
| < || < |
| > || > |
| [ || [ |
| ] || ] ||