Addition error with ruby-1.9.2 [duplicate]

Question

When I add 0.1+0.2 I am getting 0.30000000000000004 but when I add the same number in ruby 1.8.7 I am getting the correct answer 0.3. I get 0.3 by rounding but I just want to get 0.3 on ruby 1.9.2 by adding 0.1 and 0.2

Answer 1

You need bigdecimal for this to make work.

(BigDecimal('0.1') + BigDecimal("0.2")).to_f

See below link:

http://redmine.ruby-lang.org/issues/4394