UBound
Returns the upper bound of an array's dimension
result = UBound( array [, dimension ] )
array
Returns the upper bound of an array's dimension.
UBound returns the largest value that can be used as an index into a particular dimension of an array.
Array dimensions are numbered from one (1) to n, where n is the total number of dimensions. If dimension is not specified, UBound will return the upper bound of the first dimension. If dimension is less than one (1) or greater than the total number of dimensions (n) in the array, the result is undefined.
Syntax
Usage
result = UBound( array [, dimension ] )
Parameters
array
an array of any type
dimensionthe dimension to get upper bound of
Return Value
Returns the upper bound of an array's dimension.
Description
UBound returns the largest value that can be used as an index into a particular dimension of an array.
Array dimensions are numbered from one (1) to n, where n is the total number of dimensions. If dimension is not specified, UBound will return the upper bound of the first dimension. If dimension is less than one (1) or greater than the total number of dimensions (n) in the array, the result is undefined.
Example
Dim array(-10 To 10, 5 To 15, 1 To 2) As Integer
Print UBound(array) 'returns 10
Print UBound(array, 2) 'returns 15
Print UBound(array, 3) 'returns 2
Print UBound(array) 'returns 10
Print UBound(array, 2) 'returns 15
Print UBound(array, 3) 'returns 2
'' determining the size of an array
Dim As Short array(0 To 9)
Dim As Integer arraylen, arraysize
arraylen = UBound(array) - LBound(array) + 1
arraysize = arraylen * SizeOf( Short )
Print "Number of elements in array:", arraylen '10
Print "Number of bytes used in array:", arraysize '10 * 2 = 20
Dim As Short array(0 To 9)
Dim As Integer arraylen, arraysize
arraylen = UBound(array) - LBound(array) + 1
arraysize = arraylen * SizeOf( Short )
Print "Number of elements in array:", arraylen '10
Print "Number of bytes used in array:", arraysize '10 * 2 = 20
'' determining the size of a multi-dimensional array
Dim As Long array4D(1 To 2, 1 To 3, 1 To 4, 1 To 5)
Dim As Integer arraylen, arraysize
arraylen = (UBound(array4D, 4) - LBound(array4D, 4) + 1) _
* (UBound(array4D, 3) - LBound(array4D, 3) + 1) _
* (UBound(array4D, 2) - LBound(array4D, 2) + 1) _
* (UBound(array4D, 1) - LBound(array4D, 1) + 1)
arraysize = arraylen * SizeOf( Long )
Print "Number of elements in array:", arraylen '2 * 3 * 4 * 5 = 120
Print "Number of bytes used in array:", arraysize '120 * 4 = 480
Dim As Long array4D(1 To 2, 1 To 3, 1 To 4, 1 To 5)
Dim As Integer arraylen, arraysize
arraylen = (UBound(array4D, 4) - LBound(array4D, 4) + 1) _
* (UBound(array4D, 3) - LBound(array4D, 3) + 1) _
* (UBound(array4D, 2) - LBound(array4D, 2) + 1) _
* (UBound(array4D, 1) - LBound(array4D, 1) + 1)
arraysize = arraylen * SizeOf( Long )
Print "Number of elements in array:", arraylen '2 * 3 * 4 * 5 = 120
Print "Number of bytes used in array:", arraysize '120 * 4 = 480
See also
