[Solved] What will be printed by this Swift code?let optionalNumber: Int? = 5 let number = optionalNumber ?? 10 print(number) | Swift

Swift - Optionals

What will be printed by this Swift code?

let optionalNumber: Int? = 5
let number = optionalNumber ?? 10
print(number)

A10

B5

Cnil

DError

Step-by-Step Solution

Solution:

Step 1: Check optionalNumber value
optionalNumber contains 5, so it is not nil.
Step 2: Apply nil coalescing operator
Since optionalNumber is not nil, the operator returns the left side value 5.
Final Answer:
5 -> Option B
Quick Check:
Nil coalescing returns left side if not nil [OK]

Quick Trick: Returns left value if not nil, else right [OK]

Common Mistakes:

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