Literal Constants

A literal constant is an entity with a fixed value:

    +12345     ! INTEGER
    2.         ! REAL
    1.0        ! REAL
    -6.6E-06   ! REAL
    -6.6D-06   ! DOUBLE PRECISION
    .FALSE.    ! LOGICAL
    'Mau''dib' ! CHARACTER
    "Mau'dib"  ! CHARACTER

Note,

• there are only two LOGICAL values.
• integers are represented by a sequence of digits with a + or - sign, + signs are optional.
• REAL constants contain a decimal point or an exponentiation symbol, INTEGER constants do not.
• character literals are delimited by the double or single quote symbols, " and '.
• two occurrences of the delimiter inside a string produce one occurrence on output; for example 'Mau''dib' but not "Mau''dib" because of the differing delimiters;
• there is only a finite range of values that numeric literals can take.
• constants may also include a kind specifier.

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