learn_ruby_ch2_pt3

Question 1

If statement, check for zero

Answer 1

value = 0

if value.zero? then
puts “value is zero.”
end

Question 2

Array example (pacific)

Hash example

Answer 2

pacific = [ “Washington”, “Oregon”, “California”]
pacific[0] # => “Washington”

pacific = { “WA” => “Washington”, “OR” => “Oregon”, “CA” => “California” }
pacific[“OR”] # => “Oregon”

Question 3

define a method (hello) and then undefine the method

Answer 3

def hello
puts “Hello”
end

hello # => Hello

undef hello

Question 4

define a method (repeat) with arguments

Answer 4

def repeat( word, times )
puts word * times
end

repeat(“Hello! “, 3) # => Hello! Hello! Hello!
repeat “Good-bye! “, 4 # => Good-bye! Good-bye! Good-bye! Good-bye!

Question 5

return a value

Answer 5

In Ruby, the last value in a method is returned, with or without an explicit return statement.