Is this variable an array?

Hi Lawrence,

I'm not sure to understand everything in your code but here are two ways to make a new array :

1. Make an instance of the array class

roman = Array.new

1. Declare a variable as an empty array

roman = []

Once you have created a new array you can push things inside as follow :

roman << 'thing'

So I think your method old_roman(num) would rather look like :

def roman(num) 

roman = []

roman << 'M' * num

 end

You can find all the details about array in the array documentation I hope it will be helpfull.

Sebastien,

Thanks for the response! Yeah that is what I thought too. Below is a ruby code from Chris Pine's Learn to Program book. The program is to write a method that when passed an integer it returns a string containing the proper Roman numeral.

def old_roman_numeral num raise 'Must use positive integer' if num <= 0 roman = '' roman << 'M' * (num / 1000) roman << 'D' * (num % 1000 / 500) roman << 'C' * (num % 500 / 100) roman << 'L' * (num % 100 / 50) roman << 'X' * (num % 50 / 10) roman << 'V' * (num % 10 / 5) roman << 'I' * (num % 5 / 1) roman end puts(old_roman_numeral(1999)) =>MDCCCCLXXXXVIIII

line 3 threw me off since I have not seen that syntax before.

by the way side note how did you make your code come out like that in the forum hahaa. Thanks for all the help!!

I'm glad this helped! ;) You actually have to wrap your code into 3 backtick characters. I'm quite sure you used 3 quotation marks instead of backticks, and that's why it's does not appear the good way.