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Character Type

(Corresponds to Section 4.8 of ANSI X3.9-1978 FORTRAN 77.)

A character constant may be delimited by a pair of double quotes (") instead of apostrophes. In this case, an apostrophe within the constant represents a single apostrophe, while a double quote is represented in the source text of the constant by two consecutive double quotes with no intervening spaces.

A character constant may be empty (have a length of zero).

A character constant may include a substring specification, The value of such a constant is the value of the substring--for example, the value of 'hello'(3:5) is the same as the value of 'llo'.