Every language whether it be our communicating language or a computer language such as Java or a web-language like HTML has its own language and special set of alphabets. Only those characters can be used with that language. The special alphabets used with the Fortran language is known as the Fortran character set.
The Fortran Character set
| No. of Symbols | Type | Values |
| 26 | Uppercase Letters | A-Z |
| 26 | Lowercase Letters | a-z |
| 10 | Digits | 0-9 |
| 01 | Underscore Character | _ |
| 05 | Arithmetic Symbols | + - * / ** |
| 17 | Misc | ( ).=,'$;!%&;<>? and blank |
| 11 | F-2003 | ~ \[ ]`{ }| # @ |
The Fortran 95 character consists of 86 symbols, and the Fortran 2003 character set consists of 97 characters as shown in the above table.
In Fortran, uppercase and lowercase letters are equivalent. Therefore, A is equivalent to a. So, Fortran is case insensitive. But C++ or Java etc are case sensitive languages.
In Fortran, uppercase and lowercase letters are equivalent. Therefore, A is equivalent to a. So, Fortran is case insensitive. But C++ or Java etc are case sensitive languages.
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