8.185 NOT — Logical negation

Description:
NOT returns the bitwise Boolean inverse of I.
Standard:
Fortran 95 and later
Class:
Elemental function
Syntax:
RESULT = NOT(I)
Arguments:
I The type shall be INTEGER.
Return value:
The return type is INTEGER, of the same kind as the argument.
See also:
IAND, IEOR, IOR, IBITS, IBSET, IBCLR

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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc-4.9.3/gfortran/NOT.html