Truncate float to 2 decimals

ruby-talk
1

how do i truncate the float to 2 decimals

irb(#<Object:0x3d95578>):001:0> f=0.911501706632285
=> 0.911501706632285

2

just use the normal math way

cfp:~ > cat a.rb
float = 0.911501706632285

puts( Integer(float * 100) / Float(100) )

cfp:~ > ruby a.rb
0.91

a @ http://codeforpeople.com/

···

On Aug 13, 2008, at 9:47 AM, Junkone wrote:

how do i truncate the float to 2 decimals

irb(#<Object:0x3d95578>):001:0> f=0.911501706632285
=> 0.911501706632285

--
we can deny everything, except that we have the possibility of being better. simply reflect on that.
h.h. the 14th dalai lama

3

Junkone wrote:

how do i truncate the float to 2 decimals

irb(#<Object:0x3d95578>):001:0> f=0.911501706632285
=> 0.911501706632285

Do you really want to change f?

f2 = (f*100).to_i / 100.0

Or do you just want to display f with 2 decimals?

"%5.2f" % f

···

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4

=> "0.91"

James Edward Gray II

···

On Aug 13, 2008, at 10:47 AM, Junkone wrote:

how do i truncate the float to 2 decimals

irb(#<Object:0x3d95578>):001:0> f=0.911501706632285
=> 0.911501706632285

>> "%0.2f" % 0.911501706632285

5

With Facets:

  require 'facets/float/round'

  f=0.911501706632285

  f.round_at(2)

or

  f.round_to(.01)

Also, Ruby 1.9 modifies #round to take a decimal place, I believe.

T.

6

You might also try :
    puts (((float * 100.0).round / 100.0).to_i)

ara.t.howard wrote:

···

On Aug 13, 2008, at 9:47 AM, Junkone wrote:

how do i truncate the float to 2 decimals

irb(#<Object:0x3d95578>):001:0> f=0.911501706632285
=> 0.911501706632285

just use the normal math way

cfp:~ > cat a.rb
float = 0.911501706632285

puts( Integer(float * 100) / Float(100) )

cfp:~ > ruby a.rb
0.91

a @ http://codeforpeople.com/
--
we can deny everything, except that we have the possibility of being better. simply reflect on that.
h.h. the 14th dalai lama