OpenOffice.org BASIC Guide.pdf - OpenOffice.org wiki

Conversion Functions 44
Dim A As String
Dim B As Integer
Dim C As Integer
B = 1
C = 1
A = B + C
which at first glance seems straightforward, ultimately proves to be something of a trap.
The Basic interpreter first calculates the result of the addition process and then converts
this into a string, which, as its result, produces the string 2.
If, on the other hand, the Basic interpreter first converts the start values B and C into a
string and applies the plus operator to the result, it produces the string 11.
The same applies when using variant variables:
Dim A
Dim B
Dim C
B = 1
C = "1"
A = B + C
Since variant variables may contain both numbers and strings, it is unclear whether
variable A is assigned the number 2 or the string 11.
The error sources noted for implicit type conversions can only be avoided by careful
programming; for example, by not using the variant data type.
To avoid other errors resulting from implicit type conversions, OpenOffice.org Basic offers
a range of conversion functions, which you can use to define when the data type of an
operation should be converted:
CStr(Var)
converts any data type into a string.
CInt(Var)
converts any data types into an integer value.
CLng(Var)
converts any data types into a long value.
CSng(Var)
converts any data types into a single value.
CDbl(Var)
converts any data types into a double value.
CBool(Var)