Basic Terms

Some of the FORTRAN basic terms and concepts are:

• A program consists of one or more program units.

• A program unit is a sequence of statements, terminated by an END.

• A statement consists of zero or more key words, symbolic names, literal constants, statement labels, operators, and special characters.

• Each key word, symbolic name, literal constant, and operator consists of one or more characters from the FORTRAN character set.

• A character constant can include any valid ASCII character.

• A statement label consists of 1 to 5 digits, with at least one nonzero.