True or false, an implicitly unwrapped optional variable must have an exclamation mark affixed after it every time it is used. 答案选项组

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02-07-2021
Computers and Technology

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True or false, an implicitly unwrapped optional variable must have an exclamation mark affixed after it every time it is used. 答案选项组

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Munali Munali · Answer 1 · 2021-07-05T05:34:19-04:00

Munali Munali

05-07-2021

Answer:

False.

Explanation:

Implicit unwrapped optional variables are those which are at option and they might be nil. It is not necessary that all implicit unwrapped optional variables should have an exclamation mark. Swift may eliminate the need for unwrapping.

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