# Array Arguments

Arrays are sequences of elements. Each element of an actual array is associated with the element of the dummy array that has the same position in array element order.

If the dummy argument is an explicit-shape or assumed-size array, the size of the dummy argument array must not exceed the size of the actual argument array.

The type and kind parameters of an explicit-shape or assumed-size dummy argument must match the type and kind parameters of the actual argument, but their ranks need not match.

If the dummy argument is an assumed-shape array, the size of the dummy argument array is equal to the size of the actual argument array. The associated actual argument must not be an assumed-size array or a scalar (including a designator for an array element or an array element substring).

If the actual argument is an array section with a vector subscript, the associated dummy argument must not be defined and it must not have the INTENT (OUT), INTENT (INOUT), VOLATILE, or ASYNCHRONOUS attribute.

If an actual argument is an array section or an assumed-shape array, and the corresponding dummy argument has either the VOLATILE or ASYNCHRONOUS attribute, that dummy argument must be an assumed-shape array.

If an actual argument is a pointer array, and the corresponding dummy argument has either the VOLATILE or ASYNCHRONOUS attribute, that dummy argument must be an assumed-shape array or a pointer array.

The declaration of an array used as a dummy argument can specify the lower bound of the array.

If a dummy argument is allocatable, the actual argument must be allocatable and the type parameters and ranks must agree. An example of an allocatable function with allocatable arrays appears in FUNCTION.

Dummy argument arrays declared as assumed-shape, deferred-shape, or pointer arrays require an explicit interface visible to the caller.

Parent topic: Argument Association in Procedures

## See Also

Arrays
Array association
Procedure Interfaces
Argument association for details on general rules for procedure argument association
Array Elements for details on array element order
Explicit-Shape Specifications for details on explicit-shape arrays
Assumed-Shape Specifications for details on assumed-shape arrays
Assumed-Size Specifications for details on assumed-size arrays