Double

A double-precision floating-point value type.

Inheritance AbsoluteValuable, CVarArgType, Comparable, CustomDebugStringConvertible, CustomStringConvertible, Equatable, FloatLiteralConvertible, FloatingPointType, Hashable, IntegerLiteralConvertible, SignedNumberType, Strideable, _CVarArgAlignedType, _CVarArgPassedAsDouble, _ObjectiveCBridgeable, _Reflectable View Protocol Hierarchy →
Import
  • import Swift

Initializers

init()

Create an instance initialized to zero.

Declaration

  • init()
init(_: Double)

Create an instance initialized to value.

Declaration

init(_: Float)

Construct an instance that approximates other.

Declaration

init(_: Float80)

Construct an instance that approximates other.

Declaration

init(_: Int)

Declaration

init(_: Int8)

Declaration

init(_: Int16)

Declaration

init(_: Int32)

Declaration

init(_: Int64)

Declaration

init(_: NSNumber)

[Foundation]

Declaration

  • init(_ number: NSNumber)
init(_: UInt)

Declaration

init(_: UInt8)

Declaration

init(_: UInt16)

Declaration

init(_: UInt32)

Declaration

init(_: UInt64)

Declaration

init(_bits:)

Declaration

  • init(_bits v: Builtin.FPIEEE64)
init(_builtinFloatLiteral:)

Declaration

  • init(_builtinFloatLiteral value: Builtin.FPIEEE80)
init(_builtinIntegerLiteral:)

Declaration

  • init(_builtinIntegerLiteral value: Builtin.Int2048)
init(floatLiteral:)

Create an instance initialized to value.

Declaration

  • init(floatLiteral value: Double)
init(integerLiteral:)

Create an instance initialized to value.

Declaration

  • init(integerLiteral value: Int64)
init?(_:)

Construct from an ASCII representation.

Returns the result of calling the POSIX function strtod_l using the "C" locale, unless text contains non-ASCII text or whitespace, or is not completely consumed by the call. Otherwise, returns nil.

See the strtod (3) man page for details of the exact format accepted.

Declaration

Static Variables

static var NaN: Double

A quiet NaN.

Declaration

  • static var NaN: Double { get }
static var infinity: Double

The positive infinity.

Declaration

  • static var infinity: Double { get }
static var quietNaN: Double

A quiet NaN.

Declaration

  • static var quietNaN: Double { get }

Instance Variables

var debugDescription: String

A textual representation of self.

Declaration

  • var debugDescription: String { get }
var description: String

A textual representation of self.

Declaration

  • var description: String { get }
var floatingPointClass: FloatingPointClassification

The IEEE 754 "class" of this type.

Declaration

var hashValue: Int

The hash value.

Axiom: x == y implies x.hashValue == y.hashValue.

Note: The hash value is not guaranteed to be stable across different invocations of the same program. Do not persist the hash value across program runs.

Declaration

  • var hashValue: Int { get }
var isFinite: Bool

true iff self is zero, subnormal, or normal (not infinity or NaN).

Declaration

  • var isFinite: Bool { get }
var isInfinite: Bool

true iff self is infinity.

Declaration

  • var isInfinite: Bool { get }
var isNaN: Bool

true iff self is NaN.

Declaration

  • var isNaN: Bool { get }
var isNormal: Bool

true iff self is normal (not zero, subnormal, infinity, or NaN).

Declaration

  • var isNormal: Bool { get }
var isSignMinus: Bool

true iff self is negative.

Declaration

  • var isSignMinus: Bool { get }
var isSignaling: Bool

true iff self is a signaling NaN.

Declaration

  • var isSignaling: Bool { get }
var isSubnormal: Bool

true iff self is subnormal.

Declaration

  • var isSubnormal: Bool { get }
var isZero: Bool

true iff self is +0.0 or -0.0.

Declaration

  • var isZero: Bool { get }

Static Methods

static func abs(_:)

Returns the absolute value of x.

Declaration

Instance Methods

func advancedBy(_:)

Returns a Self x such that self.distanceTo(x) approximates n.

Complexity: O(1).

Declaration

func distanceTo(_:)

Returns a stride x such that self.advancedBy(x) approximates other.

Complexity: O(1).

Declaration

func stride(through:by:)

Returns the sequence of values (self, self + stride, self + stride + stride, ... last) where last is the last value in the progression less than or equal to end.

Note: There is no guarantee that end is an element of the sequence.

Declaration

Declared In

Strideable
func stride(to:by:)

Returns the sequence of values (self, self + stride, self + stride + stride, ... last) where last is the last value in the progression that is less than end.

Declaration

Declared In

Strideable

2 inherited items hidden. (Show all)