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# AdditiveArithmetic Implementations

## Topics

### Operators

[`static func + (Self) -> Self`](/documentation/Swift/Float/+(_:))

Returns the given number unchanged.

[`static func += (inout Self, Self)`](/documentation/Swift/Float/+=(_:_:)-5g9j2)

Adds two values and stores the result in the left-hand-side variable.

[`static func -= (inout Self, Self)`](/documentation/Swift/Float/-=(_:_:)-2aqso)

Subtracts the second value from the first and stores the difference in the
left-hand-side variable.

### Type Properties

[`static var zero: Self`](/documentation/Swift/Float/zero)

The zero value.

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