Description: | Returns the upper bounds for all dimensions of an array, or the upper bound for a specified dimension. | ||

Class: | Inquiry function; Generic | ||

Arguments: |
ARRAY | Must be an array (of any data type). It must not be an allocatable array that is not allocated, or a disassociated pointer. It can be an assumed-size array if DIM is present with a value less than the rank of ARRAY. | |

DIM (opt) | Must be a scalar integer
with a value in the range 1 to n, where n is the rank
of ARRAY. | ||

Results: |
The result type is default integer. If DIM
is present, the result is a scalar. Otherwise, the result is a rank-
one array with one element for each dimension of ARRAY. Each element
in the result corresponds to a dimension of ARRAY.
If ARRAY is an array section or an array expression that is not a whole array or array structure component, UBOUND (ARRAY, DIM) has a value equal to the number of elements in the given dimension. If ARRAY is a whole array or array structure component, UBOUND (ARRAY, DIM) has a value equal to the upper bound for subscript DIM of ARRAY (if DIM is nonzero). If DIM has size zero, the corresponding element of the result has the value zero. |

**Examples**

Consider the following:

REAL ARRAY_A (1:3, 5:8) REAL ARRAY_B (2:8, -3:20)

UBOUND (ARRAY_A) is (3, 8). UBOUND (ARRAY_A, DIM=2) is 8.

UBOUND (ARRAY_B) is (8, 20). UBOUND (ARRAY_B (5:8, :)) is (4,24) because the number of elements is significant for array section arguments.

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