Generic Function


Returns the absolute value of the given number.


func abs<T>(_ x: T) -> T where T : Comparable, T : SignedNumeric



A signed number.

Return Value

The absolute value of x.


The absolute value of x must be representable in the same type. In particular, the absolute value of a signed, fixed-width integer type’s minimum cannot be represented.

let x = Int8.min
// x == -128
let y = abs(x)
// Overflow error

See Also

Finding the Sign and Magnitude

var magnitude: UInt

The magnitude of this value.

typealias Int.Magnitude

A type that can represent the absolute value of any possible value of this type.

func signum() -> Int

Returns -1 if this value is negative and 1 if it’s positive; otherwise, 0.