Ruby语法笔记_ruby专题_

 first_name = gets.chomp 

 first_name.capitalize! 

 first_name.upcase! 

 first_name.downcase! 

 print <

 # 我是注释 

 #{first_name} 

 if a < b puts '1' elsif b < a puts '2' end 

 class Classname def functionname(params) puts params end end class1 = Classname.new class1.functionname('1') unless unless false print 'ok' else print 'no' end 

 print 'puts' user_input = gets.chomp user_input.downcase! if user_input.include?"s" print 'has s' end 

 # s -> th user_input.gsub!(/s/,"th") 

 puts 'okok #{user_input}' 

 counter = 1 while counter < 11 puts counter counter = counter + 1 end 

 counter = 1 until counter > 10 print counter counter = counter + 1 end 

 for num in 1...10 puts num end 

 i = 20 loop do i -= 1 print "#{ i }" break if i <= 0 end 

 i = 20 loop do i -= 1 next if i%2 != 0 print "#{i}" break if i <= 0 end 

 my_array = [1,2,3,4,5] 

 numbers = [1, 2, 3, 4, 5] # one way to loop numbers.each { |item| puts item } # another way to loop numbers.each do |item| puts item end 

 10.times { print 'ok'}) 

 num = 1 while num <= 50 do print num num += 1 end 

 num = 1 until num > 50 do print num num += 1 end 

 num = 0 loop do num += 1 print "Ruby!" break if num == 30 end 

 text.split(",") puts "Text to search through: " text = gets.chomp puts "Word to redact" redact = gets.chomp words = text.split(" ") words.each do |word| print word end