IALL (The GNU Fortran Compiler)

### 8.145 `IALL` — Bitwise AND of array elements ¶

Synopsis:

  `RESULT = IALL(ARRAY[, MASK])`
  `RESULT = IALL(ARRAY, DIM[, MASK])`

Description:

  Reduces with bitwise AND the elements of ARRAY along dimension DIM if the corresponding element in MASK is `TRUE`.

Class:

  Transformational function

Arguments:

  ARRAY | Shall be an array of type `INTEGER` or `UNSIGNED`
  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.

Return value:

  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 n-1, where n equals the rank of ARRAY, and a shape similar to that of ARRAY with dimension DIM dropped is returned.

Example:

      PROGRAM test_iall
        INTEGER(1) :: a(2)

        a(1) = b'00100100'
        a(2) = b'01101010'

        ! prints 00100000
        PRINT '(b8.8)', IALL(a)
      END PROGRAM

Standard:

  Fortran 2008 and later, extension for `UNSIGNED` (see Unsigned integers)

See also:

  `IANY` — Bitwise OR of array elements,
  `IPARITY` — Bitwise XOR of array elements,
  `IAND` — Bitwise logical and