Float

From RubySpec

From Programming Ruby, First edition: "Float objects represent real numbers using the native architecture's double-precision floating point representation." Here is some sample code using float objects, using irb for ruby 1.8.5 on a 64-bit machine

 irb(main):009:0> 1.4353535.class
 => Float
 irb(main):010:0> 1.4353535.to_f
 => 1.4353535 
 irb(main):011:0> 1.4353535.to_s
 => "1.4353535"
 irb(main):012:0> 1.4353535.to_a
(irb):12: warning: default `to_a' will be obsolete
 => [1.4353535]
 irb(main):013:0> 1.4353535.to_i
 => 1
 irb(main):014:0> 1.4353535.nan? # IEEE nan
 => false
 irb(main):015:0> 1.4353535.floor
 => 1
 irb(main):016:0> 1.4353535.round
 => 1

 irb(main):025:0> 1000000e-10000
 (irb):25: warning: Float 1000000e-10000 out of range
  => 0.0

Float::CONSTANT

------------------------------------------------------------------------
     Float::CONSTANT
------------------------------------------------------------------------
   Float::DIG = 15
   Float::EPSILON = 2.22044604925031e-16
   Float::MANT_DIG = 53
   Float::MIN_10_EXP = -307
   Float::MAX_10_EXP = 308 
   Float::MAX_EXP = 1024
   Float::MIN = 2.2250738585072e-308
   Float::MAX = 1.79769313486232e+308
   Float::MIN_EXP = -1021
   Float::RADIX = 2