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

Your file Hello.scala is a script. You should be able to run it from the command prompt with scala Hello.scala.

$ scala Hello.scala 
HelloWorld!

The REPL, on the other hand, is not for running scripts. It is used for running scala code directly:

scala> println("HelloWorld!")
"HelloWorld!"

Answer 2

To execute external script (load all definitions from it) in REPL use :load <filepath> command instead of scala <filepath>.

» echo 'println("HelloWorld")' > Hello.scala
» scala
Welcome to Scala version 2.9.2 (OpenJDK Client VM, Java 1.6.0_24).
Type in expressions to have them evaluated.
Type :help for more information.

// is this what you tried to do?
scala> scala Hello.scala
<console>:1: error: ';' expected but '.' found.
   scala Hello.scala

// do this instead
scala> :load Hello.scala
Loading Hello.scala...
HelloWorld

scala>

Answer 3

If you are executing it in scala REPL .You should be using as below

:load [scala file path]

output would be as below

defined "objectname"

Then invoke the main method as the next command

objectname.main(Array())

Refer the below url for more detailed info

https://www.scala-lang.org/documentation/getting-started.html