How to convert a string or integer to binary in Ruby?

Question

How do you create integers 0..9 and math operators + - * / in to binary strings. For example:

 0 = 0000,
 1 = 0001, 
 ...
 9 = 1001

Is the

Answer 1

I am almost a decade late but if someone still come here and want to find the code without using inbuilt function like to_S then I might be helpful.

find the binary

def find_binary(number)
  binary = []  
  until(number == 0)
    binary << number%2
    number = number/2
  end
  puts binary.reverse.join
end