Modern Finance AddProduct

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AddProduct

Adds an amount times a rate to a running total, rounding only once at the end.

Syntax

CurrencyAccum.AddProduct( byref c as Currency, byval rate as float64 )

Notes

• A CurrencyAccum holds a 128-bit running total, so a long series of multiplied amounts does not lose a scaled unit per step.
• This is the shape for applying a tax or interest rate to many lines and totalling them: rounding once at the end is not the same number as rounding each line.
• Total( ) reads the accumulated value back as a Currency.

Examples

#import "std/money"
using money

dim acc as CurrencyAccum
dim as Currency line_ = CurrencyFromDouble( 19.99 )

'' Rate applied per line, but rounded only ONCE, at the end
for i as int32 = 1 to 3
    acc.AddProduct( line_, 0.075 )
next

print acc.Count( )           '' 3
print acc.Total( ).ToString( )                '' 4.4978

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Library: Finance
Category: Finance
Documented under: Members