Why does scala not see my hello.class as a program in command prompt?

Question

I am trying to run scala program in cmd prompt. And I get the message.

"No, such file or class on class path exists."

Things that may be relevant:

1. I had several warnings from Windows about downloading and running the scala executable from the site. (I ignored them all )

2. I had to enter a Admin Command Line to use scala, and it did not show up in my program files after install.

3. The installer never actually popped up for me. So I ran the executable as administration, now it appears in my program X86 folder. and I can enter scala mode without being in Admin mode. 4. The .scala file does compile. with scalac hello.scala

4. The code given to me by my instructor, in a file I named hello.scala object hello extends App{ println("Hello") }

Finally, I have looked at 2 Youtube videos and 2 Stack posts before asking this question. Thank you all for your time.

Answer 1

Here's a complete transcript of a successful session compiling and running on this code:

% echo 'object hello extends App{ println("Hello") }' > hello.scala
% scalac hello.scala             
% scala hello       
Hello

Are you doing something different? If so, what is it? Show a transcript of your entire effort, including all commands you entered and all error messages you got.