abs(_:)

Declaration

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

Parameters

• x:

  A signed number.

Return Value

The absolute value of x.

Discussion

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

• magnitude
• Int.Magnitude
• signum()