Question

I have the following code. However I get a error. How is this supposed to be written.

puts 'What is your favourite number?'
number = gets.chomp
number = number.to_i + 1
puts "you would like " + number + 'much better' 

Answer 1

It always helps if you include the error. There are two ways to fix that error:

1. Interpolate the value: puts "you would like #{number} much better"
2. Turn it from a number to a string: puts "you would like " + number.to_s + 'much better'

The former, #{...} syntax, evaluates the content of the braces as Ruby, and then applies to_s to the result, before injecting it into the string. My two examples are literally equivalent.

As to why it fails? + doesn’t do type coercion in Ruby, which actually has very little implicit conversion going on, unlike other languages in similar spaces.