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author | stomar <stomar@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-04-09 13:30:31 +0000 |
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committer | stomar <stomar@b2dd03c8-39d4-4d8f-98ff-823fe69b080e> | 2017-04-09 13:30:31 +0000 |
commit | 963829552795668dc5b04c3a40bb52161bcd1076 (patch) | |
tree | b8a5712c7624371215fedf00fbd43771a61947ee /math.c | |
parent | 1a0dbb9eaa8b5f39025c924844c5e0e6d0822590 (diff) |
math.c: improve docs for Math.sqrt
* math.c: [DOC] mention possibly surprising behavior of Math.sqrt
due to floating point arithmetic; also refer to BigDecimal#sqrt.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@58291 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Diffstat (limited to 'math.c')
-rw-r--r-- | math.c | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -590,6 +590,13 @@ math_log10(VALUE unused_obj, VALUE x) * # [8, 2.82842712474619, 8.0] * # [9, 3.0, 9.0] * # [10, 3.16227766016838, 10.0] + * + * Note that the limited precision of floating point arithmetic + * might lead to surprising results: + * + * Math.sqrt(10**46).to_i #=> 99999999999999991611392 (!) + * + * See also BigDecimal#sqrt. */ static VALUE |