diff options
Diffstat (limited to 'doc/gawk.texi')
| -rw-r--r-- | doc/gawk.texi | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/doc/gawk.texi b/doc/gawk.texi index 0372897f..bdce4be8 100644 --- a/doc/gawk.texi +++ b/doc/gawk.texi @@ -23281,13 +23281,17 @@ 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 |