Type OperatorSwiftFoundationSwift

# &*=(_:_:)

Multiplies two values and stores the result in the left-hand-side variable, wrapping any overflow.

Available because

`Self`

conforms to`FixedWidthInteger`

.

`static func &*= (lhs: inout Self, rhs: Self)`

## Parameters

- lhs
The first value to multiply.

- rhs
The second value to multiply.

## Overview

The masking multiplication assignment operator (`&*=`

) silently wraps any overflow that occurs during the operation. In the following example, the product of `10`

and `50`

is greater than the maximum representable `Int8`

value, so the result is the partial value after discarding the overflowing bits.

```
var x: Int8 = 10
x &*= 5
// x == 50
var y: Int8 = 10
y &*= 50
// y == -12 (after overflow)
```

For more about arithmetic with overflow operators, see Overflow Operators in *The Swift Programming Language*.