adding 29, 30

ex29.rb

@@ -0,0 +1,39 @@
+#!/usr/bin/env ruby
+
+people = 20
+cats = 30
+dogs = 15
+
+if people < cats
+  puts "Too many cats! The world is doomed!"
+end
+
+if people > cats
+  puts "Not many cats! The world is saved!"
+end
+
+if people < dogs
+  puts "The world is drooled on!"
+end
+
+if people > dogs
+  puts "The world is dry!"
+end
+
+dogs += 5
+
+if people >= dogs
+  puts "People are greater than or equal to dogs."
+end
+
+if people <= dogs
+  puts "People are less than or equal to dogs."
+end
+
+if people == dogs
+  puts "People are dogs."
+end
+
+# 1. What do you think the if does to the code under it?
+# I think if waits to do anything with the code inside depending on the result of the if 
+#

ex30.rb

@@ -0,0 +1,33 @@
+#!/usr/bin/env ruby
+
+people = 30
+cars = 40
+buses = 15
+
+if cars > people
+  puts "We should take the cars."
+elsif cars < people
+  puts "We should not take the cars."
+else
+  puts "We can't decide."
+end
+
+if buses > cars
+  puts "That's too many buses."
+elsif buses < cars
+  puts "Maybe we could take the buses."
+else
+  puts "We still can't decide."
+end
+
+if people > buses
+  puts "Alright, let's just take the buses."
+else
+  puts "Fine, lets stay home then."
+end
+
+
+# Extra Credit:
+# 1. Try to guess what elsif and else are doing.
+# try the if, if that doesn't work, try the elsif, if none of those work, do the else
+#

ex30_3.rb

@@ -0,0 +1,37 @@
+#!/usr/bin/env ruby
+
+# Extra Credit:
+# 3. Try some more complex boolean expressions like cars > people and buses < cars. Above each line write an English description of what the line does.
+
+boys = 5
+girls = 5
+fathers = 10
+mothers = 10
+
+if boys and girls <= fathers
+  puts "Boys and girls is <= fathers"
+end
+
+if boys and girls < fathers and mothers
+  puts "Boys and girls is less than fathers and mothers"
+end
+
+if not (boys > fathers) and not (girls > mothers)
+  puts "Scouts!"
+else
+  puts "No scouts!"
+end
+
+if boys and girls and fathers and mothers < 50
+  puts "Everyone is less than 50"
+else
+  puts "Everyone is more than 50"
+end
+
+if boys == girls and fathers == mothers
+  puts "Boys == Girls and Fathers == Mothers"
+else
+  puts "It don't all equal"
+end
+
+