摘要：一、打印1、puts "Hello World!" puts 'Yay! Printing.' puts "I'd much rather you 'not'." -> I'd much rather you 'not'. puts 'I "said" do not touch this.' -> I "said" do not touch this.2、注释 #3、数学表达式 puts 3+2+4%2 puts " 阅读全文