Adds two decimal values.


func NSDecimalAdd(_ result: UnsafeMutablePointer<Decimal>, _ leftOperand: UnsafePointer<Decimal>, _ rightOperand: UnsafePointer<Decimal>, _ roundingMode: NSDecimalNumber.RoundingMode) -> NSDecimalNumber.CalculationError


Adds leftOperand to rightOperand and stores the sum in result. Decimal instances can represent a number with up to 38 significant digits. If a number is more precise than that, it must be rounded off. roundingMode determines how to round it off. There are four possible rounding modes:

The return value indicates whether any machine limitations were encountered in the addition. If none were encountered, the function returns NSCalculationNoError. Otherwise it may return one of the following values: NSCalculationLossOfPrecision, NSCalculationOverflow or NSCalculationUnderflow. For descriptions of all these error conditions, see exceptionDuringOperation(_:error:leftOperand:rightOperand:) in NSDecimalNumberBehaviors.

For more information, see Number and Value Programming Topics.

See Also

Performing Arithmetic Using References

func NSDecimalCompact(UnsafeMutablePointer<Decimal>)

Compacts the decimal structure for efficiency.

typealias Decimal.RoundingMode

An alias for an enumeration that specifies possible rounding modes.

enum NSDecimalNumber.RoundingMode

These constants specify rounding behaviors.

typealias Decimal.CalculationError

An alias for a type that specifies possible calculation errors.

Beta Software

This documentation contains preliminary information about an API or technology in development. This information is subject to change, and software implemented according to this documentation should be tested with final operating system software.

Learn more about using Apple's beta software