4. What is de-initializer and how it is written in Swift?

What is de-initializer and how it is written in Swift?

Answer

A de-initializer is declared immediately before a class instance is de-allocated.  You write de-initializer with the deinit keyword.  De-initializer is written without any parenthesis, and it does not take any parameters. It is written as 

deinit  {

// perform the deinitialization

}

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