example.rb

@base_value = 5
@string_value = "This is awesome!!!     "

def write_awesome_stuff
    puts "Ruby is an awesome language"
end

def write_message(name)
  puts "#{name} is an awesome programmer."
end

def multiply(x,y)
    return x * y
end

def subtract(x,y)
  x - y
end

def smallest_number(x,y)
  if x < y
    return x
  elsif x == y
    return "They're the same!"
  else
    return y
  end
end

def numbers val
  val.each {|i| print i, "\n"}
end

def false? val
  if val == 'false' || val == 0
    return true
  else
    return false
  end
end

def base!(val)
  @base_value = val
end

def reverse!
  @string_value.reverse!
end

puts multiply(8,9) 
puts subtract(3,1)
puts smallest_number(5,5)
puts false?(true)
puts false?(false)
puts false?('false')
puts @base_value
puts base! 7
puts @base_value
puts numbers(["one", "two", "3", "4", "5",])
puts @string_value
puts @string_value.reverse!
puts @string_value.strip