---
title: "addingProduct(_:_:)"
framework: swift
role: symbol
role_heading: Instance Method
path: "swift/float80/addingproduct(_:_:)"
---

# addingProduct(_:_:)

Returns the result of adding the product of the two given values to this value, computed without intermediate rounding.

## Declaration

```swift
func addingProduct(_ lhs: Self, _ rhs: Self) -> Self
```

## Parameters

- `lhs`: One of the values to multiply before adding to this value.
- `rhs`: The other value to multiply.

## Return Value

Return Value The product of lhs and rhs, added to this value.

## Discussion

Discussion This method is equivalent to the C fma function and implements the fusedMultiplyAdd operation defined by the IEEE 754 specification.