Frederick Cheung wrote in post #1020782: > by default if you are working with integers you'll always get integers > back (by truncation). If you want floating point numbers then you > should convert the numbers you're working with to floating point > numbers first (using to_f), so > > 5 /2 will always return 2, but 5.0 / 2 will produce 2.5
This might also help to clarify what's happening: $ irb ruby-1.9.2-p290 :014 > x = 5 => 5 ruby-1.9.2-p290 :015 > y = 3 => 3 ruby-1.9.2-p290 :016 > z = x / y => 1 ruby-1.9.2-p290 :017 > x.class => Fixnum ruby-1.9.2-p290 :018 > y.class => Fixnum ruby-1.9.2-p290 :019 > z.class => Fixnum ruby-1.9.2-p290 :020 > x = 5 => 5 ruby-1.9.2-p290 :021 > y = 3.0 => 3.0 ruby-1.9.2-p290 :022 > z = x / y => 1.6666666666666667 ruby-1.9.2-p290 :023 > x.class => Fixnum ruby-1.9.2-p290 :024 > y.class => Float ruby-1.9.2-p290 :025 > z.class => Float ruby-1.9.2-p290 :026 > x = 5 => 5 ruby-1.9.2-p290 :027 > y = 3 => 3 ruby-1.9.2-p290 :028 > z = x.fdiv(y) => 1.6666666666666667 ruby-1.9.2-p290 :029 > x.class => Fixnum ruby-1.9.2-p290 :030 > y.class => Fixnum ruby-1.9.2-p290 :031 > z.class => Float ruby-1.9.2-p290 :032 > z = x.quo(y) => (5/3) ruby-1.9.2-p290 :033 > z.class => Rational ruby-1.9.2-p290 :034 > z.to_f => 1.6666666666666667 ruby-1.9.2-p290 :035 > z.to_i => 1 -- Posted via http://www.ruby-forum.com/. -- You received this message because you are subscribed to the Google Groups "Ruby on Rails: Talk" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/rubyonrails-talk?hl=en.
