Open Watcom FORTRAN 77 Language Reference

Language Reference
1. Blanks are never used as zeroes and blanks embedded in constants are not allowed except in
character constants.
2. An input item of type real or double precision must have an input field suitable for F editing
except that no fractional digits are assumed unless a decimal point is present in the field. Such a
field will be called a numeric input field.
3. An input item of type complex or double precision complex must consist of a left parenthesis
followed by two numeric input fields separated by a comma and followed by a right parenthesis.
The numeric input fields may be preceded or followed by blanks. The end of record can only
appear between the first numeric field and the comma or between the comma and the second
numeric field. Note that a null value must not be used as the real or imaginary part but may
represent the entire complex constant.
4. An input item of type logical must not include either a slash or a comma among the optional
characters allowed in L editing.
5. An input item of type character consists of a non-empty string of characters enclosed in
apostrophes. Apostrophes in character constants are represented by two consecutive apostrophes
without a blank or end of record separating them. Character constants may span records. If this
is the case, the end of record does cause a blank to be inserted into the character constant. Note
that a comma or slash in a character constant is not a value separator. A character input field is
assigned to a character input item as though it were a character assignment.
11.10.2 Namelist-Directed Output
The form of the data items in an output record is suitable for input using a namelist-directed READ
statement.
1. Output records are written using the ampersand character (&), not the dollar sign ($), although
the dollar sign is accepted as an alternative during input. That is, the output data is preceded by
"&name" and is followed by "&END".
2. All variable and array names specified in the NAMELIST list and their values are written out,
each according to its type.
3. Character data is enclosed in apostrophes.
4. The fields for the data are made large enough to contain all the significant digits.
5. The values of a complete array are written out in columns.
242 Namelist-Directed Formatting (Extension)