1 files changed, 7 insertions, 5 deletions
diff --git a/ruby.html.markdown b/ruby.html.markdown
index 560c1750..6e618861 100644
--- a/ruby.html.markdown
+++ b/ruby.html.markdown
@@ -43,17 +43,18 @@ false.class #=> FalseClass
 1 == 1 #=> true
 2 == 1 #=> false
 
-# apart from false itself, nil is the only other 'falsey' value
-
-nil == false #=> true
-0 == false #=> false
-
 # Inequality
 1 != 1 #=> false
 2 != 1 #=> true
 !true  #=> false
 !false #=> true
 
+# apart from false itself, nil is the only other 'falsey' value
+
+!nil   #=> true
+!false #=> true
+!0     #=> false
+
 # More comparisons
 1 < 10 #=> true
 1 > 10 #=> false
@@ -194,6 +195,7 @@ end
 counter = 1
 while counter <= 5 do
   puts "iteration #{counter}"
+  counter += 1
 end
 #=> iteration 1
 #=> iteration 2