init(exactly:)

Creates a new instance initialized to the given value, if it can be represented without rounding.

init?(exactly other: Float)

Mangled symbol

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FNV24 hash: 7CL0T

Parameters

other: The value to use for the new instance.

If other can’t be represented as an instance of Double without rounding, the result of this initializer is nil. In particular, passing NaN as other always results in nil.

let x: Float = 21.25
let y = Double(exactly: x)
// y == Optional.some(21.25)

let z = Double(exactly: Float.nan)
// z == nil