Instance Method

isEqual(to:)

Returns a Boolean value indicating whether this instance is equal to the given value.

Declaration

func isEqual(to other: Float) -> Bool

Parameters

other

The value to compare with this value.

Return Value

true if other has the same value as this instance; otherwise, false.

Discussion

This method serves as the basis for the equal-to operator (==) for floating-point values. When comparing two values with this method, -0 is equal to +0. NaN is not equal to any value, including itself. For example:

let x = 15.0
x.isEqual(to: 15.0)
// true
x.isEqual(to: .nan)
// false
Double.nan.isEqual(to: .nan)
// false

The isEqual(to:) method implements the equality predicate defined by the IEEE 754 specification.

Relationships

From Protocol

See Also

Comparing Values

Floating-Point Operators for Float

Perform arithmetic and bitwise operations or compare values.

func isLess(than: Float) -> Bool

Returns a Boolean value indicating whether this instance is less than the given value.

func isLessThanOrEqualTo(Float) -> Bool

Returns a Boolean value indicating whether this instance is less than or equal to the given value.

func isTotallyOrdered(belowOrEqualTo: Float) -> Bool

Returns a Boolean value indicating whether this instance should precede or tie positions with the given value in an ascending sort.

static func maximum(Float, Float) -> Float

Returns the greater of the two given values.

static func maximumMagnitude(Float, Float) -> Float

Returns the value with greater magnitude.

static func minimum(Float, Float) -> Float

Returns the lesser of the two given values.

static func minimumMagnitude(Float, Float) -> Float

Returns the value with lesser magnitude.