# Float("7.")

**URL:** <https://www.ruby-forum.com/t/float-7/138505>\
**Category:** Development\
**Created:** [May 23, 2008, 8:02pm UTC](https://www.ruby-forum.com/t/float-7/138505 "2008-05-23T20:02:15Z")\
**Posts on this page:** 1\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tanaka\_A](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/c67d28/32.png) [@Tanaka\_A](https://www.ruby-forum.com/u/Tanaka_A)\
**Post date:** [May 23, 2008, 8:02pm UTC](https://www.ruby-forum.com/t/float-7/138505/1 "2008-05-23T20:02:15Z")

</div>

e$B8=:\_!"e(BFloat(“7.”) e$B$,e(B 7.0 e$B$K$J$j$^$9!#e(B

% ./ruby -ve ‘p Float(“7.”)’  
ruby 1.9.0 (2008-05-23 revision 16559) [i686-linux]  
7.0

1.8.5, 1.8.6 e$B$G$Oe(B ArgumentError e$B$K$J$k$h$&$G$9!#e(B

% ruby-1.8 -ve ‘p Float(“7.”)’  
ruby 1.8.7 (2008-05-23 patchlevel 5000) [i686-linux]  
7.0  
% ruby-1.8.6p111 -ve ‘p Float(“7.”)’  
ruby 1.8.6 (2007-09-24 patchlevel 111) [i686-linux]  
-e:1:in `Float': invalid value for Float(): "7." (ArgumentError) from -e:1 % ruby-1.8.5 -ve 'p Float("7.")' ruby 1.8.5 (2006-08-25) [i686-linux] -e:1:in`Float’: invalid value for Float(): “7.” (ArgumentError)  
from -e:1  
% ruby-1.8.4 -ve ‘p Float(“7.”)’  
ruby 1.8.4 (2005-12-24) [i686-linux]  
7.0

e$BD4$Y$F$\_$k$H!"e(B1.8.5 e$B$Ge(B ArgumentError e$B$K$J$C$?$N$Oe(B  
[ruby-dev:29036] e$B$G0U?^$5$l$?JQ99$N$h$&$G$9!#e(B

1.9, 1.8 e$B$Ge(B ArgumentError e$B$G$J$/$J$C$?$N$O!"e(Bstrtod  
e$B$,JQ$o$Ce(B  
e$B$?$+$i$N$h$&$G$9!#e(B