Can compile Scala programs but can't run them

Question

I am able to compile scala programs using scalac in terminal but I get the warning.

Charless-Macintosh:src Charles$ scalac hello.scala
Charless-Macintosh:src Charles$ scala HelloWorld
No such file or class on classpath: HelloWorld

Is this to do with .profile on scala. I'm pretty confused as to what is happening. Many thanks

Answer 1

The current directory is typically not in the classpath by default. So you need to give explicitly:

$ scala -cp . HelloWorld