and(3I)

NAME
     AND - Computes logical product

SYNOPSIS
     AND ([I=]i,[J=]j)

IMPLEMENTATION
     UNICOS, UNICOS/mk, IRIX systems

     CF90, MIPSpro 7 Fortran 90, MIPSpro Fortran 77

STANDARDS
     Fortran extension

DESCRIPTION
     AND is an elemental function.  It accepts the following arguments:

     i         Must be of type Boolean, integer, real, Cray pointer, or
               logical.

     j         Must be of type Boolean, integer, real, Cray pointer, or
               logical.

NOTES
     AND is an outmoded routine.  Refer to the Fortran Language Reference
     Manual, Volume 3, for information about outmoded features and their
     preferred standard alternatives.  The name of this intrinsic cannot be
     passed as an argument.

CAUTIONS
     Unexpected results can occur when Boolean functions are declared
     external and then used with logical arguments.  The external Boolean
     functions always treat their arguments as type Boolean and return a
     Boolean result on UNICOS and UNICOS/mk systems.  On IRIX systems, they
     return an integer result.

RETURN VALUES
     When given two arguments of type logical, AND computes a logical
     product and returns a logical result.

     When given two arguments of type Boolean, integer, real, or pointer,
     AND computes a bit-wise logical product and returns a Boolean result
     (on UNICOS and UNICOS/mk systems) or an integer result (on IRIX
     systems).

     The following tables show both the logical product and bit-wise
     logical product:

     ---------------------------------------------------------------------
        Logical        Logical             (Logical Variable 1) AND
      Variable 1     Variable 2              (Logical Variable 2)
     ---------------------------------------------------------------------
           T              T                           T
           T              F                           F
           F              T                           F
           F              F                           F
     ---------------------------------------------------------------------

     ------------------------------------------------------------------
        Bit of        Bit of            (Bit of Variable 1) AND
      Variable 1    Variable 2            (Bit of Variable 2)
     ------------------------------------------------------------------
          1             1                          1
          1             0                          0
          0             1                          0
          0             0                          0
     ------------------------------------------------------------------

EXAMPLES
     The following section of Fortran code shows the AND function used with
     two arguments of type logical:

          LOGICAL L1, L2, L3
          ...
          L3 = AND(L1,L2)

     The following section of Fortran code shows the AND function used with
     two arguments of type integer.  The bit patterns of the arguments and
     result are also given.  For clarity, only the rightmost 8 bits are
     shown.

      INTEGER I1, I2, I3
      I1 = 12
      I2 = 10
      ...
      I3 = AND(I1,I2)
       -------------------------------     -------------------------------
      | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 |   | 0 | 0 | 0 | 0 | 1 | 0 | 1 | 0 |
       -------------------------------     -------------------------------
                        I1                               I2

                        -------------------------------
                       | 0 | 0 | 0 | 0 | 1 | 0 | 0 | 0 |
                        -------------------------------
                                        I3

SEE ALSO
     Intrinsic Procedures Reference Manual for the printed version of this
     man page.