Hello all,

I am trying to learn Ruby and I am stuck on trying to add a number in a string. I am following a tutorial and I don't see this particular type of addition covered in the book. Can anyone help me with my problem?

The idea of this small program is to ask for a number, then recommend a higher number as the better number.

The code I have developed is as follows:

puts 'What is your favorite number?'

number = gets.chomp

puts number + ' is a nice number'

puts number + ' is a good number, but ' + number + 1 +' is a much better number'


However, the error I get is:

[lmcilwain@Blade programs]$
favoritnumber.rb:8: syntax error, unexpected tUPLUS, expecting $end
puts number + ' is a good number, but ' + number + 1.to_i +' is a much better number'


I Have tried putting .to_i at the end of the 1 so it read number + 1.to_i
or even put a .to_i at the end of the number variable in the string (not that I think I needed to) but I still don't have any luck.

I'm learning Ruby too. Off the bat, you are not supposed to be able to add a integer to a string. Perhaps try (untested)

I gave that a shot and I got pretty much the same error:

favoritnumber.rb:8: syntax error, unexpected tUPLUS, expecting $end
puts number + ' is a good number, but ' + (number + 1).to_s +' is a much better number'

Maybe I should be using variable to do the adding and I tried this and I still didn't have any luck. What I tried was

number = gets.chomp
betternumber = number + 1

puts number + ' is a good number, but ' + betternumber +' is a much better number'

Oh, try making sure there is a space on each side of the + operator.

Yes there are spaces between everything pretty much.

Doubtful. This works fine:

However, it is better form to write as:

Ok I did miss a ' after the last + at the end of the last statment but I would have known that I needed to turn that number variable into an integer to get that addition.

I also don't know the significance of the # and {} around the variable number just yet. I am only on chapter 3 Hopefully my form will get better as I continue to learn this.

BTW, both ways that you have suggested worked fine.

Ah, the stringify sort of thing. Forgot about that. (must.. write.. more.. Ruby)