# NSDecimalDivide(_:_:_:_:) Divides one decimal value by another. ``` func NSDecimalDivide(_ result: UnsafeMutablePointer, _ leftOperand: UnsafePointer, _ rightOperand: UnsafePointer, _ roundingMode: NSDecimalNumber.RoundingMode) -> NSDecimalNumber.CalculationError ``` ## Discussion Divides `leftOperand` by `rightOperand` and stores the quotient, possibly rounded off according to `roundingMode`, in `result`. If `rightOperand` is 0, returns `NSDivideByZero`. For explanations of the possible return values and rounding modes, see [`NSDecimalAdd(_:_:_:_:)`](/documentation/Foundation/NSDecimalAdd(_:_:_:_:)). Note that repeating decimals or numbers with a mantissa larger than 38 digits cannot be represented precisely. For more information, see [Number and Value Programming Topics](https://developer.apple.com/library/archive/documentation/Cocoa/Conceptual/NumbersandValues/NumbersandValues.html#//apple_ref/doc/uid/10000038i). --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)