Microsoft® Visual Basic® Scripting Edition

Microsoft® Visual Basic® Scripting Edition
UBound Function | Language Reference |

Description

Returns the largest available subscript for the indicated dimension of an array.

Syntax

UBound(arrayname[, dimension])

The UBound function syntax has these parts:

Part Description

arrayname Required. Name of the array variable; follows standard variable naming conventions.

dimension Optional. Whole number indicating which dimension's upper bound is returned. Use 1 for the first dimension, 2 for the second, and so on. If dimension is omitted, 1 is assumed.

Remarks

The UBound function is used with the LBound function to determine the size of an array. Use the LBound function to find the lower limit of an array dimension.
The default lower bound for any dimension is always 0. As a result, UBound returns the following values for an array with these dimensions:
Dim A(100,3,4)
Statement Return Value

UBound(A, 1) 99

UBound(A, 2) 2

UBound(A, 3) 3

© 1996 by Microsoft Corporation.
file: /Techref/language/asp/vbs/vbscript/183.htm, 3KB, , updated: 1996年11月22日 11:12, local time: 2025年9月5日 22:50,

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