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8.283 XOR — Bitwise logical exclusive OR ¶

Description:

Bitwise logical exclusive or.

This intrinsic routine is provided for backwards compatibility with GNU Fortran 77. For integer arguments, programmers should consider the use of the IEOR — Bitwise logical exclusive or intrinsic and for logical arguments the .NEQV. operator, which are both defined by the Fortran standard.

Standard:

GNU extension

Class:

Function

Syntax:

RESULT = XOR(I, J)

Arguments:

I	The type shall be either a scalar INTEGER type or a scalar LOGICAL type or a boz-literal-constant.
J	The type shall be the same as the type of I or a boz-literal-constant. I and J shall not both be boz-literal-constants. If either I and J is a boz-literal-constant, then the other argument must be a scalar INTEGER.

Return value:

The return type is either a scalar INTEGER or a scalar LOGICAL. If the kind type parameters differ, then the smaller kind type is implicitly converted to larger kind, and the return has the larger kind. A boz-literal-constant is converted to an INTEGER with the kind type parameter of the other argument as-if a call to INT — Convert to integer type occurred.

Example:

PROGRAM test_xor
  LOGICAL :: T = .TRUE., F = .FALSE.
  INTEGER :: a, b
  DATA a / Z'F' /, b / Z'3' /

  WRITE (*,*) XOR(T, T), XOR(T, F), XOR(F, T), XOR(F, F)
  WRITE (*,*) XOR(a, b)
END PROGRAM

See also:

Fortran 95 elemental function: IEOR — Bitwise logical exclusive or