commandline session
$ 4.2.29 15 515---> scala Welcome to Scala version 2.9.2 (OpenJDK 64-Bit Server VM, Java 1.6.0_24). Type in expressions to have them evaluated. Type :help for more information. scala> 4*2-7 res0: Int = 1 scala> res0+1 res1: Int = 2 scala> 2*0.4 res2: Double = 0.8 scala> "hello" res3: java.lang.String = hello scala> "hello"+res3 res4: java.lang.String = hellohello scala> "hello"+res2 res5: java.lang.String = hello0.8 scala> "hello res2" res6: java.lang.String = hello res2 scala>