Variable currency values are especially useful
when you need to perform calculations that require several digits
of precision. This section provides information about using
variable currency values in scripts.

To use a variable currency value as a local
variable, use the keyword vcurrency. For example, the
following statement declares a local variable currency value.

local vcurrency interest_rate;

You can perform calculations with variable
currency values much like you perform calculations with standard
currency values. All currency functions such as round() and truncate() work properly
with variable currency values.

To ensure no precision is lost when performing
calculations, intermediate variable currency results can have up to
39 digits with up to 15 decimal places. The number of digits and
decimal places is determined by the value being calculated.

Rounding

When performing calculations with currency or
variable currency values, the final results often must be rounded.
You can use the round() function to round individual values.
You can also use the default roundmode to
statement to specify the default rounding characteristics for all
calculations in a specific script.

Retrieving variable currency
characteristics

If precision is important in a calculation, you
may want to retrieve the characteristics of a specific variable
currency field or value. Use the precision() function to
retrieve the number of digits a variable currency field or variable
can store. Use the scale() function to
retrieve how many decimal places a variable currency field or
variable has.