The difference between Int and Unwrapped Int

Asked May 15 '18 at 05:29

Active May 15 '18 at 05:31

Viewed 37 times

I couldn’t find this anywhere on the web but when declaring class properties, I saw this version of implementation:

var _number: Int!

When I tried to remove the (!) I saw no difference. When declaring a class property, or in general, what is the difference between ClassName! And ClassName (without the !)? What is the meaning of adding the (!)?

Thank you!

edited May 15 '18 at 05:31

asked May 15 '18 at 05:29

Gal Shahar

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Find a book about Swift and search for "optionals". – dasdom May 15 '18 at 05:30
! tell force unwrap. its all about optional. – singh.jitendra May 15 '18 at 05:38
Yeah I know what optionals are, but what does it mean when being made on a class property? – Gal Shahar May 15 '18 at 05:52

The difference between Int and Unwrapped Int

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