The Fortran character set consists of 26 uppercase and 26 lowercase letters (alphabetic characters), the numbers 0 through 9 (digits), and special characters. This manual refers to letters (uppercase and lowercase) together with the underscore (_) as extended alphabetic characters. The extendedalphabetic characters together with the digits are also referred to as alphanumeric characters. The complete character set is
Letters: A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
a b c d e f g h i j k l m n o p q r s t u v w x y z
Digits: 0 1 2 3 4 5 6 7 8 9Special Characters:
Lowercase alphabetic characters, the exclamation point (!), the underscore (_), and the double quote (") are extensions to Fortran 77. Digits are interpreted in base 10. A special character can serve as an operator, a part of a character constant, a part of a numeric constant, or some other function
Use blank characters freely to improve the appearance and readability of Fortran statements. They have no significance in Fortran statements, except
These special considerations are discussed in detail in later sections.
Table lists escape sequences for representing non-graphic characters and for compatibility with the C programming language.
Table : C Escape Sequences
The compiler treats the backslash character as the beginning of an escape sequence by default. To use backslash as a normal character, compile the program with the –backslash option.
Fortran Elements And Concepts
Constants And Data Structures
Assignment And Data Statements
Statement Functions And Subprograms
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