Boolean values: Difference between revisions

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@@ Line 537: / Line 537: @@
 <lang perl>my $x = 0.0;
-my $true_or_false = $x ? 'true' : 'false';     # false
+my $true_or_false = $x ? 'true' : 'false';     # false</lang>
-</lang>
 or
-<lang perl>my $x = 1;   # true
+<lang perl>my $x = 1;          # true
 my $true_or_false;
-if($x){
+if ($x) {
-   $true_or_false = 'true';
+    $true_or_false = 'true';
-}else{
-   $true_or_false = 'false';
 }
+else {
-</lang>
+    $true_or_false = 'false';
+}</lang>
 The values in Perl that are false are: <tt>0</tt> (as a number (including <tt>0.0</tt>), or as the string <tt>'0'</tt>, but '''not''' the string <tt>'0.0'</tt>), the empty string <tt><nowiki>''</nowiki></tt>, the empty list <tt>()</tt>, and <tt>undef</tt>. Everything else is true. See [http://perldoc.perl.org/perlsyn.html#Truth-and-Falsehood perlsyn].