hello world printf "hello world!" # æ«å°¾æ¹è¡ãªã => hello world! print "hello world!" # æ«å°¾æ¹è¡ãªã => hello world! puts "hello world!" # æ«å°¾æ¹è¡ãã => hello world!Â¥n p "hello world!" # å½¢å¼ãããã => "hello world!"Â¥n å¤æ° lang = "Ruby" # å¤æ° lang = "Java" # æ¸ãæãOK LANG = "Ruby" # å®æ°ï¼å é 大æåï¼ LANG = "Java" # æ¸ãæãä¸å¯ãã¨ã©ã¼ã¨ãªã æ°å¤ http://ruby-doc.org/core-2.1.3/Numeric.html(v2.1.3) http://ruby-doc.org/core-2.1.3/Float.html(v2.1
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