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Test: Swift - Optional Binding

1. Which of the following are safe ways to unwrap an optional in Swift?



Results
Congratulations! Correct Answer.
You Answered: None. If you took the test, your answer will show up here.
Correct Answer: Checking for nil; Optional Binding;
Explanation
In both forced and implicit unwrapping, there is no check for nil. Both these case work fine if there is a non-nil value inside the optional. Both of those methods will result in a crash if the optional was never properly initialized and contain nil.

In checking for nil, you will be explicitly checking whether the optional contains nil and will proceed further only then. In Optional Binding, the newly created constant/variable in the if clause will have a non-nil value. If not else block will be executed.
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Question 1 of 5


Test is Based on this Article
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This article discusses the safer ways of unwrapping an optional in Swift that includes Optional Binding.
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Test on using Optional Binding in Swift.

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