[Solved] Identify the error in this Swift code using guard:func validate(_ input: String?) { guard input != nil else print("Input is nil") return print("Input is \(input!)") } | Swift

Swift - Control Flow

Identify the error in this Swift code using guard:

func validate(_ input: String?) {
    guard input != nil else
        print("Input is nil")
        return
    print("Input is \(input!)")
}

AGuard condition should be inside parentheses

BUsing force unwrap instead of optional binding

CMissing braces {} after else

DNo error, code is correct

Step-by-Step Solution

Solution:

Step 1: Check guard syntax requirements
A guard statement must have an else block enclosed in braces { }.
Step 2: Identify missing braces
The code lacks braces after else, causing a syntax error.
Final Answer:
Missing braces {} after else -> Option C
Quick Check:
Guard else block always needs braces [OK]

Quick Trick: Always use braces {} after guard else [OK]

Common Mistakes:

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