| Computer Desktop Encyclopedia: free-form language |
A language in which statements can reside anywhere on a line or even cross over lines. It does not imply less syntax structure, just more freedom in placing statements. For example, any number of blank spaces are allowed between symbols. Most high-level programming languages are free-form.
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| Wikipedia: Free-form language |
In computer programming, a free-form language is a programming language in which the positioning of characters on the page in program text is not significant. Program text does not need to be placed in specific columns as on old punched card systems, and frequently ends of lines are not significant. Whitespace is used to delimit tokens, and does not have other significance.
Most free-form languages descend from Algol, including C, Pascal, and Perl. These are also structured programming languages, which is sometimes thought to go along with the free-form syntax: Earlier imperative programming languages such as Fortran 77 used particular columns for line numbers, which structured languages don't use or need. Lisp languages are also free-form, although they do not descend from Algol. REXX is mostly free-form, though in some cases whitespace is a concatenation operator.
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