19 lines
824 B
Text
19 lines
824 B
Text
Haskell-Decimal
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===============
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Fixed-precision decimal numbers, where the precision is carried with
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the numbers at run-time.
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The `Decimal` type is mainly intended for doing financial arithmetic
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where the number of decimal places may not be known at compile time
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(e.g. for a program that handles both Yen and Dollars) and the
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application must not drop pennies on the floor. For instance if you
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have to divide $10 between three people then one of them has to get
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$3.34.
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The number of decimal places in a value is represented as a Word8,
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allowing for up to 255 decimal places. Functions preserve precision.
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Addition and subtraction operators return a result with the precision
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of the most precise argument, so 2.3 + 5.678 = 7.978. Multiplication
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and division use whatever precision is necessary up to 255 decimal
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places.
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