Roman Numerals
Given an integer as input, we want to produce the Roman Numeral equivalent output as below:
```ruby roman_numeral(2) => “II”
roman_numeral(4) => “IV”
roman_numeral(5) => “V”
roman_numeral(10) => “X”
Given an integer as input, we want to produce the Roman Numeral equivalent output as below:
```ruby roman_numeral(2) => “II”
roman_numeral(4) => “IV”
roman_numeral(5) => “V”
roman_numeral(10) => “X”