Reduces with bitwise AND the elements of ARRAY along dimension DIM if the corresponding element in MASK is TRUE
.
Fortran 2008 and later
Transformational function
RESULT = IALL(ARRAY[, MASK]) 
RESULT = IALL(ARRAY, DIM[, MASK]) 
ARRAY  Shall be an array of type INTEGER

DIM  (Optional) shall be a scalar of type INTEGER with a value in the range from 1 to n, where n equals the rank of ARRAY. 
MASK  (Optional) shall be of type LOGICAL and either be a scalar or an array of the same shape as ARRAY. 
The result is of the same type as ARRAY.
If DIM is absent, a scalar with the bitwise ALL of all elements in ARRAY is returned. Otherwise, an array of rank n1, where n equals the rank of ARRAY, and a shape similar to that of ARRAY with dimension DIM dropped is returned.
PROGRAM test_iall INTEGER(1) :: a(2) a(1) = b'00100100' a(2) = b'01101010' ! prints 00100000 PRINT '(b8.8)', IALL(a) END PROGRAM
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Licensed under the GNU Free Documentation License, Version 1.3.
https://gcc.gnu.org/onlinedocs/gcc7.2.0/gfortran/IALL.html