Why I can't execute scala file?

Question

I am a newbie to Scala, it\'s the first time I\'m running Scala, when I installed Scala, I created a file named Hello.scala, the content is:

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Answer 1

• Adding -nc flag saved my day.

  scala -nc Hello.scala

• What is -nc?

  -nc no compilation daemon: do not use the fsc offline compiler

  Source: http://alvinalexander.com/java/jwarehouse/scala-2.11/compiler/scala/tools/nsc/GenericRunnerCommand.scala.shtml

• What is fsc offline compiler?

  fsc – Fast offline compiler for the Scala 2 language

  Source: http://www.scala-lang.org/old/sites/default/files/linuxsoft_archives/docu/files/tools/fsc.html