Execute a file via keyboard in Finder

I have a Finder window open to a directory that contains files. They have an associated application to them.

What key combination can I hit to have the selected file opened in its default application? What's the equivalent of double-clicking that file with the mouse?

I don't want to have to take my hands off the keyboard.

I have tried without success:

  • Cmd Enter
  • Ctrl Enter
  • Option Enter

Solution 1:

Cmd-O opens the file in its default application.

Also, Cmd-P opens the file and starts the print dialog (not supported by all applications).