how to round up a float number?

rubyonrails-talk
#1

for example:

i = 0.33533333333 round up to "0.34"

thanks.

#2

david wrote:

i = 0.33533333333 round up to "0.34"

sprintf("%2.2f", i)

#3

Hmm and if you want a float then:

eval(sprintf("%2.2f",i))

Also, if you want to just round:

i.round #=> will give 0 for 0.33335

And If you don't really like eval then, you would have to get your hand
dirty and :

class Float
  def round2f places
    sprintf("%.#{places}f",self).to_f
  end
end

#4

hi,
what about this…

irb(main):035:0> i = 0.33533333333
=> 0.33533333333
irb(main):036:0> Integer(i*100)/100.0
=> 0.33

in case .34 is required

can do
irb(main):040:0> Integer((i*100).ceil)
=> 34

regards
gaurav

#5

Hi, I've got it. thanks, everyone.