LBound
Returns the lower bound of an array's dimension
Syntax
`
Declare Function LBound ( array() As Any, ByVal dimension As Integer = 1 ) As Integer
`
Usage
`
result = LBound( array [, dimension ] )
`
Parameters
`array`
an array of any type
`dimension`
the dimension to get lower bound of
Return Value
Returns the lower bound of an array's dimension.
Description
`LBound` returns the lowest 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, `LBound` will return the lower bound of the first dimension.
If `dimension` is zero (`0`), `LBound` returns `1`, corresponding to the lower bound of the array dimensions `1`..`n`. `UBound` returns `n`, the number of dimensions, in this case. This can be used to detect the array's number of dimensions.
For any other (non-zero) `dimension` values outside of the valid range `1`..`n`, `LBound` returns `0`. `UBound` returns `-1` in this case. This can be used to detect whether a certain dimension exists in the array, and also works when used on an empty array which does not have any valid dimensions.
Thus, for empty dynamic arrays, we get:

- `Lbound(array) = 0` and `Ubound(array) = -1` (dimension 1 does not exist)
- `Lbound(array, 0) = 1` and `Ubound(array, 0) = 0` (zero dimensions)
- `@array(Lbound(array)) = 0` (no data buffer allocated) - Note: No longer supported since fbc 1.20.0

Example
`
Dim array(-10 To 10, 5 To 15, 1 To 2) As Integer
Print LBound(array) 'returns -10
Print LBound(array, 2) 'returns 5
Print LBound(array, 3) 'returns 1
`
See also

- `UBound`
- `Static`
- `Dim`
- `ReDim`