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Home>IT Tests>Questions>Swift: What is the output of the following code? `var x = 10; x = x + undefined; print(x)`

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Swift: What is the output of the following code? `var x = 10; x = x + undefined; print(x)`

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What does the (?) mark specify for the following variable: let pikachu: Pokemon?

Author: Smart&SoftStatus: PublishedQuestion passed 391 times
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Is the following code valid? ``` var x = 10 var y = x ```