We can check if a variable is a float in Ruby using Object#is_a?.
{{code:php $number = 1.2; $result = is_float($number); var_export($result); // => true }}
{{code:ruby number = 1.2 p number.is_a?(Float) # => true }}
{{related: var/is_bool var/is_int var/is_numeric var/is_string var/is_array var/is_object }}