Question

I would like to have the result as 0 if some_float is nil. How do I do that?

some_float = 9.238
or 
some_float = nil

some_float.round(2)

Answer 1

Just call a .to_f before round

some_float.to_f.round(2)

Because when you call to_f on nil, it’ll return 0.0

9.238.to_f.round(2) # => 9.24
nil.to_f.round(2) # => 0.0