init(exactly:)

Creates an integer from the given floating-point value, if it can be represented exactly.

iOS: 14.0+
macOS: 11.0+
tvOS: 14.0+
watchOS: 7.0+

init?(exactly source: Float16)

Mangled symbol

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FNV24 hash: 3DLTV

Parameters

source: A floating-point value to convert to an integer.

If the value passed as source is not representable exactly, the result is nil. In the following example, the constant x is successfully created from a value of 21.0, while the attempt to initialize the constant y from 21.5 fails:

let x = Int(exactly: 21.0)
// x == Optional(21)
let y = Int(exactly: 21.5)
// y == nil