There is no output supposed to happen after executing the open
statement. Output happens after print
or write
, never after just open
.
What open
does is to open the file for access by other statements like read
or write
so that you can read something from the file, then do something with the values you read and then perhaps write something on the screen. Or to write something into the file.
Read other questions and answers here for examples, but be sure to open a textbook or tutorial and really study the basics. Programming is quite hard, you have to study from some resource. You cannot just do trial and error.
See
Read data from a .csv file in fortran
and many other related questions and answers, but I can guarantee you they will be too dificult to understand unless you study the basics.