Obtains the lower bound of a dimension of an array.
LowerBound ( array {, n } )
Argument |
Description |
|---|---|
array |
The name of the array for which you want the lower bound of a dimension |
n (optional) |
The number of the dimension for which you want the lower bound. The default is 1 |
Long. Returns the lower bound of dimension n of array and -1 if n is greater than the number of dimensions of the array. If any argument’s value is null, LowerBound returns null.
For variable-size arrays, memory is allocated for the array when you assign values to it. Before you assign values, the lower bound is 1 and the upper bound is 0.
The following statements illustrate the values LowerBound reports for fixed-size arrays and for variable-size arrays before and after memory has been allocated:
integer a[5], b[2,5]
LowerBound(a) // Returns 1
LowerBound(a, 1) // Returns 1
LowerBound(a, 2) // Returns -1, a has only 1 dim
LowerBound(b, 2) // Returns 1
integer c[ ]
LowerBound(c) // Returns 1
c[50] = 900
LowerBound(c) // Returns 1
integer d[-10 to 50]
LowerBound(d) // Returns - 10
