What does (TIT(I),I=1,80) mean?

In modern Fortran, the first line is an error and should be a comment, insert ! as the first non-space character.

Then the second line look like a read from a file open on logical unit 7, and uses an implied do loop to obtain the first 80 values of an array tit. It would appear to have a format statement which you have not posted.

Are you converting or learning or both, good luck anyway.

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