Exercise 24: More Practice

puts "Let's practice everything."
puts 'You\'d need to know \'bout escapes with \\ that do \n newlines and \t tabs.'

# the <<END is a "heredoc". See the Student Questions.
poem = <<END
\tThe lovely world
with logic so firmly planted
cannot discern \n the needs of love
nor comprehend passion from intuition
and requires an explanation
\n\t\twhere there is none.
END

puts "--------------"
puts poem
puts "--------------"

five = 10 - 2 + 3 - 6
puts "This should be five: #{five}"

def secret_formula(started)
  jelly_beans = started * 500
  jars = jelly_beans / 1000
  crates = jars / 100
  return jelly_beans, jars, crates
end

start_point = 10000
beans, jars, crates = secret_formula(start_point)

puts "With a starting point of: #{start_point}"
puts "We'd have #{beans} beans, #{jars} jars, and #{crates} crates."

start_point = start_point / 10
puts "We can also do that this way:"
puts "We'd have %s beans, %d jars, and %d crates." % secret_formula(start_point)

""与<<XXX的写法，\t会变成空格，\n会换行

''里面是什么就是什么

Let's practice everything.
You'd need to know 'bout escapes with \ that do \n newlines and \t tabs.
--------------
 The lovely world
with logic so firmly planted
cannot discern
 the needs of love
nor comprehend passion from intuition
and requires an explanation

                where there is none.
--------------
This should be five: 5
With a starting point of: 10000
We'd have 5000000 beans, 5000 jars, and 50 crates.
We can also do that this way:
We'd have 500000 beans, 500 jars, and 5 crates.