adding brief info on what does to_i do with a link to the documentation on the same

boddhisattva · boddhisattva · commit bb6d353acf75 · 2014-03-02T23:04:13.000+05:30
diff --git a/ruby/lesson2/tutorial.md b/ruby/lesson2/tutorial.md
@@ -79,9 +79,11 @@ In this exercise we want to generate two random numbers x and y using `Random.ra
 ```ruby
 print "#{x} + #{y} = "
 
-answer = gets.chomp().to_i
+answer = gets.to_i
 ```
 
+> [to_i](http://apidock.com/ruby/Symbol/to_i) returns an integer representation of an object.
+
 if the answer is correct, output `Right!`. If the answer is incorrect, output `Wrong :(`.
 
 > Use an _if .. else .._ statement
