Enhance isnumeric documentation.

1 files changed, 6 insertions, 2 deletions

diff --git a/doc/gawktexi.in b/doc/gawktexi.in
index 236ef638..d5373d7f 100644
--- a/doc/gawktexi.in
+++ b/doc/gawktexi.in
@@ -22193,13 +22193,17 @@ function isnumeric(x,  f)
         return 0
     @}
 @}
+@c endfile
+@end example
 
 Please note that leading or trailing white space is disregarded in deciding
 whether a value is numeric or not, so if it matters to you, you may want
 to add an additional check for that.
 
-@c endfile
-@end example
+Traditionally, it has been recommended to check for numeric values using the
+test @code{x+0 == x}. This function is superior in two ways: it will not
+report that unassigned variables contain numeric values; and it recognizes
+string values with numeric contents.
 
 @node Data File Management
 @section @value{DDF} Management