Modern Finance ToDouble

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ToDouble

Returns the amount as a double, which loses precision above about 900 billion.

Syntax

ToDouble( ) as float64

Notes

• Loses precision above about ±900 billion, where the scaled value passes 2^53 and a double can no longer hold every integer.
• Named, never implicit: there is no automatic conversion, because a silent one is how exact money arithmetic turns back into floating point without anyone noticing.
• For arithmetic, stay in Currency. This is for handing a value to something that only speaks double.

Examples

#import "std/money"
using money

dim as Currency c = CurrencyFromParts( 12, 3400 )

print c.ToDouble( )          '' 12.34

'' NAMED, never implicit -- the conversion has to be asked for, so it
'' cannot happen by accident in the middle of an exact calculation
dim as float64 d = c.ToDouble( )
print d * 3                  '' 37.02 -- and now it is floating point again

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Library: Finance
Category: Finance
Documented under: Members