How to extract the sign of an integer in Ruby?

Question

I need a function which returns/prints the sign on an integer. So far I came up with this:

def extract_sign(integer)
  integer >= 0 ? \'+\' : \'-\'
end
         


        

Answer 1

You could use Kernel#sprintf to format numbers:

def sign(i)
  sprintf("%+d", i)[0]
end

sign(100)  #=> "+"
sign(-100) #=> "-"