present(3I)

NAME
     PRESENT - Determines whether an optional argument is present

SYNOPSIS
     PRESENT ([A=]a)

IMPLEMENTATION
     UNICOS, UNICOS/mk, and IRIX systems

STANDARDS
     Fortran 90

DESCRIPTION
     The PRESENT intrinsic function determines whether an optional dummy
     argument is present.  It accepts the following argument:

     a    Must be an optional dummy argument of the procedure in which the
          PRESENT function reference appears

     PRESENT is an inquiry function.  The name of this intrinsic cannot be
     passed as an argument.

RETURN VALUES
     The result type is a default logical scalar.  The result has the value
     TRUE if a is present and otherwise has the value FALSE.

SEE ALSO
     Intrinsic Procedures Reference Manual, publication SR-2138, for the
     printed version of this man page.