Machine epsilon calculation in some languages.

machine-epsilon.go

package main

import "fmt"

func main() {
  x := 1.0
  for ; (1 + x) > 1; x = x / 2 { }

  fmt.Printf("%v\n", x * 2)
}

machine-epsilon.rb

def machine_epsilon
  x = 1.0
  while((1 + x) > 1)
    x = x / 2
  end
  x * 2
end

puts machine_epsilon # The same as Float::EPSILON