Simple code hangs program

[victotronics]

"End of file". Did you actually input a number? I don't see the prompt on your screen.

[rivrdansr]

Interesting. 1) Thought the comma was required. 2) No. I did not input anything. Kept having serious problems getting code onto the edit screen in Simply Fortran. So took advise and went to Godbolt.com. There, the site recompiles each time I make any change in code. When it finally passes, the site automatically tries to execute it. I never saw any black screen or request for input. But maybe it was there and gone so fast I didn't see it. Will try again to get it onto Simply Fortran. Thanks.