# Float('1\_\_1')

**URL:** <https://www.ruby-forum.com/t/float-1-1/130663>\
**Category:** Development\
**Created:** [March 1, 2008, 3:15pm UTC](https://www.ruby-forum.com/t/float-1-1/130663 "2008-03-01T15:15:17Z")\
**Posts on this page:** 2\
**Page:** 1

<div class="post-metadata">

**Author:** ![Tadayoshi\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/2bfe46/32.png) [@Tadayoshi\_F](https://www.ruby-forum.com/u/Tadayoshi_F)\
**Post date:** [March 1, 2008, 3:15pm UTC](https://www.ruby-forum.com/t/float-1-1/130663/1 "2008-03-01T15:15:17Z")

</div>

1.9 e$B$G!"e(BFloat(‘1\_\_1’) e$B$,%(%i!\<$K$J$j$^$;$s!#e(Bruby  
e$B\<+?H$N;z6g2r\<a$H0c$$e(B  
e$B$^$9$7!“e(B1.8 e$B$H$b0c$&$N$G!”%P%0$G$O$J$$$G$7$g$&$+!#e(B

$ ruby19 -e “Float(‘1\_\_1’)”

$ ruby19 -e “Integer(‘1\_\_1’)”  
-e:1:in `Integer': invalid value for Integer: "1__1" (ArgumentError) from -e:1:in`’

$ ruby18 -e “Float(‘1\_\_1’)”  
-e:1:in `Float’: invalid value for Float(): “1\_\_1” (ArgumentError)  
from -e:1

$ ruby18 -e “Integer(‘1\_\_1’)”  
-e:1:in `Integer’: invalid value for Integer: “1\_\_1” (ArgumentError)  
from -e:1

---

<div class="post-metadata">

**Author:** ![Tadayoshi\_F](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/t/2bfe46/32.png) [@Tadayoshi\_F](https://www.ruby-forum.com/u/Tadayoshi_F)\
**Post date:** [March 1, 2008, 4:09pm UTC](https://www.ruby-forum.com/t/float-1-1/130663/2 "2008-03-01T16:09:25Z")

</div>

e$B$J$+$@$G$9!#e(B

At Sat, 1 Mar 2008 23:14:24 +0900,  
Tadayoshi F. wrote in [ruby-dev:33952]:

> 1.9 e$B$G!"e(BFloat(‘1\_\_1’) e$B$,%(%i!\<$K$J$j$^$;$s!#e(Bruby e$B\<+?H$N;z6g2r\<a$H0c$$e(B  
> e$B$^$9$7!“e(B1.8 e$B$H$b0c$&$N$G!”%P%0$G$O$J$$$G$7$g$&$+!#e(B

e$BD\>$7$^$7$?!#e(B