Symbian blead update: Symbian port 0.2.0

[p5sagit/p5-mst-13.2.git] / pod / perlsyn.pod

diff --git a/pod/perlsyn.pod b/pod/perlsyn.pod
index 98bd8fa..5d25a77 100644 (file)
--- a/pod/perlsyn.pod
+++ b/pod/perlsyn.pod
@@ -105,9 +105,9 @@ as the last item in a statement.
 
 The number 0, the strings C<'0'> and C<''>, the empty list C<()>, and
 C<undef> are all false in a boolean context. All other values are true.
-
-Note that while 0, 0.0 and C<'0'> are false, C<'0.0'> and C<'0e0'> are
-true, but evaluate to 0 in a numeric context.
+Negation of a true value by C<!> or C<not> returns a special false value.
+When evaluated as a string it is treated as C<''>, but as a number, it
+is treated as 0.
 
 =head2 Statement Modifiers
 
@@ -199,6 +199,8 @@ The following compound statements may be used to control flow:
     if (EXPR) BLOCK elsif (EXPR) BLOCK ... else BLOCK
     LABEL while (EXPR) BLOCK
     LABEL while (EXPR) BLOCK continue BLOCK
+    LABEL until (EXPR) BLOCK
+    LABEL until (EXPR) BLOCK continue BLOCK
     LABEL for (EXPR; EXPR; EXPR) BLOCK
     LABEL foreach VAR (LIST) BLOCK
     LABEL foreach VAR (LIST) BLOCK continue BLOCK
@@ -223,6 +225,8 @@ the sense of the test is reversed.
 
 The C<while> statement executes the block as long as the expression is
 true (does not evaluate to the null string C<""> or C<0> or C<"0">).
+The C<until> statement executes the block as long as the expression is
+false.
 The LABEL is optional, and if present, consists of an identifier followed
 by a colon.  The LABEL identifies the loop for the loop control
 statements C<next>, C<last>, and C<redo>.