##CodeCademy
####basic
3 ** 3 3的3次方
string.length
tring.reverse
string.upcase
轉大寫
string.downcase
轉小寫
#單行註解
=begin 多行註解 =end
註解
name = "Kettan"
宣告變數
.method可以這樣用:
name = name.reverse.downcase.upcase
name = gets.chomp name等於使用者輸入的字串
puts "Hello, #{name}" 印出Hello, 名字
name = get.chomp.capitalize! 把輸入的字串第一個字變成大寫
user_int = Integer(gets.chopm) 取得輸入的整數
if true
puts 'hello'
elsif
puts 'œøōõ'
end
#要加end 注意這裡的elseif要打成elsif
unless hungry
puts "I'm writing Ruby programs!"
else
puts "Time to eat!"
end
#unless用法
wrong = false
puts 'Cool' unless wrong
印出兩個"""中間包起來的內容
puts """
With the three double-quotes.
We'll be able to type as much as we like.
Even 3 lines if we want, or 4, or 10.
"""