On output, if a file was opened with CARRIAGECONTROL='FORTRAN' in effect or the file is being processed by the fortpr format utility, the first character of a record transmitted to a line printer or terminal is typically a character that is not printed, but used to control vertical spacing.
The following table lists the valid control characters for printing:
Control Characters for Printing
| Character | Meaning | Effect |
|---|---|---|
| + | Overprinting | Outputs the record (at the current position in the current line) and a carriage return. |
| - | One line feed | Outputs the record (at the beginning of the following line) and a carriage return. |
| 0 | Two line feeds | Outputs the record (after skipping a line) and a carriage return. |
| 1 | Next page | Outputs the record (at the beginning of a new page) and a carriage return. |
| $ | Prompting | Outputs the record (at the beginning of the following line), but no carriage return. |
| ASCII NUL1 | Overprinting with no advance | Outputs the record (at the current position in the current line), but no carriage return. |
| 1 Specify as CHAR( 0 ). | ||
Any other character is interpreted as a blank and is deleted from the print line. If you do not specify a control character for printing, the first character of the record is not printed.