[Solved] What will be printed by the following Swift code?let optionalGreeting: String? = "Hello" let greeting = optionalGreeting ?? "Hi" print(greeting) | Swift

Swift - Optionals

What will be printed by the following Swift code?

let optionalGreeting: String? = "Hello"
let greeting = optionalGreeting ?? "Hi"
print(greeting)

AOptional("Hello")

BHi

Cnil

DHello

Step-by-Step Solution

Solution:

Step 1: Evaluate the optional value
The variable optionalGreeting contains the string "Hello", so it is not nil.
Step 2: Apply the nil coalescing operator
The expression optionalGreeting ?? "Hi" returns the value of optionalGreeting because it is not nil.
Final Answer:
Hello -> Option D
Quick Check:
Non-nil optional returns its value [OK]

Quick Trick: If left side is non-nil, ?? returns it [OK]

Common Mistakes:

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