Open Watcom FORTRAN 77 Language Reference

FORTRAN Source Program Format
FORTRAN 77 allows up to 19 continuation lines to continue a statement. Open Watcom FORTRAN 77
extends this by allowing more than 19 continuation lines. A minimum of 61 continuation lines are
permitted when the source statement ends at column 72. A minimum of 31 continuation lines are permitted
when the source statement ends at column 132. The maximum number of continuation lines depends on the
sum of the lengths of all the continuation lines.
1.3.5 Significance of the Blank Character
Except in the following cases, blank characters have no meaning within a program unit.
(1) Character and Hollerith constants.
(2) Apostrophe and H edit descriptors in format specifications.
For example, the symbolic name A B is the same as the symbolic name AB.
1.3.6 Significance of Lower Case Characters (Extension)
Except in the following cases, lower case characters are treated as if they were the upper case equivalent.
This is a Open Watcom FORTRAN 77 extension to the usual rules of FORTRAN.
(1) Character and Hollerith constants.
(2) Apostrophe and H edit descriptors in format specifications.
Hence, TOTAL, total, and Total represent the same symbolic name and 3F10.2 and 3f10.2
represent the same format edit descriptor.
1.3.7 Examples
Example:
C This and the following five lines are comment lines.
c The following statement "INDEX = INDEX + 2" has a
c statement number and is continued by placing a "$"
c in column 6.
* Column Numbers
*234567890
10 INDEX = INDEX
$ + 2
* The above blank lines are treated like comment lines.
The following example demonstrates the use of comment lines, blanks lines, and continuation lines. We
use the symbol "$" to denote continuation lines although any character other than a blank or "0" could have
been used.
Source Program Format 5