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### 9.14 `ALL`

— All values in `MASK` along `DIM` are true

*Description*:`ALL(MASK [, DIM])`

determines if all the values are true in`MASK`in the array along dimension`DIM`.*Standard*:Fortran 90 and later

*Class*:Transformational function

*Syntax*:`RESULT = ALL(MASK [, DIM])`

*Arguments*:`MASK`The type of the argument shall be `LOGICAL`

and it shall not be scalar.`DIM`(Optional) `DIM`shall be a scalar integer with a value that lies between one and the rank of`MASK`.*Return value*:`ALL(MASK)`

returns a scalar value of type`LOGICAL`

where the kind type parameter is the same as the kind type parameter of`MASK`. If`DIM`is present, then`ALL(MASK, DIM)`

returns an array with the rank of`MASK`minus 1. The shape is determined from the shape of`MASK`where the`DIM`dimension is elided.- (A)
`ALL(MASK)`

is true if all elements of`MASK`are true. It also is true if`MASK`has zero size; otherwise, it is false.- (B)
If the rank of

`MASK`is one, then`ALL(MASK,DIM)`

is equivalent to`ALL(MASK)`

. If the rank is greater than one, then`ALL(MASK,DIM)`

is determined by applying`ALL`

to the array sections.

*Example*:program test_all logical l l = all((/.true., .true., .true./)) print *, l call section contains subroutine section integer a(2,3), b(2,3) a = 1 b = 1 b(2,2) = 2 print *, all(a .eq. b, 1) print *, all(a .eq. b, 2) end subroutine section end program test_all

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