diff options
author | Andreas Schwab <schwab@suse.de> | 2003-12-31 12:17:17 +0000 |
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committer | Andreas Schwab <schwab@suse.de> | 2003-12-31 12:17:17 +0000 |
commit | 903a1a91c62ce450e1b19fb9af9cc0cad82a154f (patch) | |
tree | 0d3829e69a53610256b0e9b6ac2c70a9017938b5 /lispref/numbers.texi | |
parent | b2236c89a8669f65ac8419908a4282adfad4470a (diff) |
(Math Functions): sqrt reports a domain-error
error.
(Float Basics): Use `(/ 0.0 0.0)' instead of `(sqrt -1.0)'.
Diffstat (limited to 'lispref/numbers.texi')
-rw-r--r-- | lispref/numbers.texi | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lispref/numbers.texi b/lispref/numbers.texi index 9c71922c0d..3a4f4ae75c 100644 --- a/lispref/numbers.texi +++ b/lispref/numbers.texi @@ -172,7 +172,7 @@ to write negative floating point numbers, as in @samp{-1.0}. which provides for positive infinity and negative infinity as floating point values. It also provides for a class of values called NaN or ``not-a-number''; numerical functions return such values in cases where -there is no correct answer. For example, @code{(sqrt -1.0)} returns a +there is no correct answer. For example, @code{(/ 0.0 0.0)} returns a NaN. For practical purposes, there's no significant difference between different NaN values in Emacs Lisp, and there's no rule for precisely which NaN value should be used in a particular case, so Emacs Lisp @@ -1146,7 +1146,7 @@ integer values. @defun sqrt arg This returns the square root of @var{arg}. If @var{arg} is negative, -the value is a NaN. +it signals a @code{domain-error} error. @end defun @node Random Numbers |