Does Swift support implicit conversion?

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There is no implicitly cast in Swift.

Easy way of conversion in swift is using constructor of particular type.

Like if you want to get Float from double then you can use Float(doubleValue) and Same way if you want to convert float to integer then you can use Int(floatValue).

In your case:

let intValue = UInt8(doubleValue)

Beware that you will lose any value after the decimal point. So, choose a better way. Above conversion is just to help you in understanding.

Note that Swift always chooses Double (rather than Float) when inferring the type of floating-point numbers.

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