例 1
' The length of a string, in characters
Dim theString As String
theString$ = "alphabet"
Print Len(theString$) ' Output: 8
' The number of bytes used to hold a Single variable
Dim singleVar As Single
Print Len(singleVar!) ' Output: 4
例 2
' User-defined data type with variable-length String member
Type OrderInfo
ordID As String * 6
custName As String
End Type
' An instance of the user-defined data type
Dim ord As OrderInfo
ord.ordID$ = "OR1234"
ord.custName$ = "John R. Smith"
' Total length of the ord's members is 19.
Print Len(ord.ordID$) + Len(ord.custName)
' Length of ord is 16.
Print Len(ord)