What does “+=” (plus equals) mean?

Question

I am doing some ruby exercises and it said I need to go back and rewrite the script with += shorthand notations.

This exercise deals primarily with lear

Answer 1

You should look for a good book about Ruby, e.g. http://pragprog.com/book/ruby3/programming-ruby-1-9

The first 150 pages cover most of the basic things about Ruby.

str = "I want to learn Ruby"

i = 0
str.split.each do |word|
  i += 1
end

puts "#{i} words in the sentence \"#{str}\""

  => 5 words in the sentence "I want to learn Ruby"