Replaces this value with its additive inverse.
SDK
- Xcode 9.0+
Framework
- Swift Standard Library
Declaration
mutating func negate()
Discussion
The following example uses the negate() method to negate the value of an integer x:
var x = 21
x.negate()
// x == -21
The resulting value must be representable within the value’s type. In particular, negating a signed, fixed-width integer type’s minimum results in a value that cannot be represented.
var y = Int8.min
y.negate()
// Overflow error