Issue #13599 has been updated by nagachika (Tomoyuki Chikanaga).

Backport changed from 2.2: DONTNEED, 2.3: DONTNEED, 2.4: REQUIRED to 2.2: DONTNEED, 2.3: DONTNEED, 2.4: DONE

ruby_2_4 r59505 merged revision(s) 58913.

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Bug #13599: Float#ceil(n) doesn't work for small floats
https://bugs.ruby-lang.org/issues/13599#change-66024

* Author: Jalada (David Somers)
* Status: Closed
* Priority: Normal
* Assignee: 
* Target version: 
* ruby -v: 2.4.1
* Backport: 2.2: DONTNEED, 2.3: DONTNEED, 2.4: DONE
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When using ceil to round up to n digits (as opposed to nearest integer) with the optional first argument, it doesn't work for very small floats:

~~~
2.4.1 :001 > 0.0000000001.ceil(1)
 => 0.0   # => Expected output: 0.1

# Doing it by hand:
2.4.1 :002 > (0.0000000001 * 10).ceil / 10.0
 => 0.1
~~~



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