What are the changes being made in FORTRAN 77?

What are the changes being made in FORTRAN 77?

- FORTRAN 77 included new features and removed many shortcoming of FORTRAN 66 that was a standard.

- IF and END IF block statements are being changed from option ELSE and ELSE IF clauses.

- It provided support for more structured programming language and provided more flexibility in loop extensions.

- It allowed direct access of Input/Output file using the implicit statements like Character or its based data type.

- PARAMETER statements are used to specify the constants and other statements like SAVE is used to show the persistence of the local variables.