Character set

The Fortran 90 standard character set, shown in Table 2-1 “Fortran 90 character set”, consists of letters, digits, the underscore character, and special characters. The HP Fortran character set consists of the Fortran 90 character set, plus:

Control characters (Tab, Newline , and Carriage return). Carriage return and Tab are usually treated as “white space” in a source program. You can use them freely to make the source easier to read.
The pound sign (#) character in column 1 to initiate a comment. This is an HP extension that allows C preprocessor directives embedded in source files to be treated as comments.
Any other characters in the HP character set listed in Appendix B. These characters may be used in character constants, character string edit descriptors, comments, and I/O records.
Table 2-1 Fortran 90 character set
Category
Characters
Letters
A to Z, a to z
Digits
0 to 9
Underscore
_
Special characters
blank (space)
: ! “ % & ; < > ? $
= + - * / ( ) , . '

Lowercase alphabetic characters are equivalent to uppercase characters except when they appear in character strings or Hollerith constants.

HP Fortran supports only the default character type, CHARACTER(KIND=1), as described in “Type declaration for intrinsic types”. Support is provided, however, for Extended Unix Code (EUC) and Shift-JIS encoding.

Character set

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