Identify the error in this Swift program using @main:

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Swift - Basics and Runtime

Identify the error in this Swift program using @main:

@main class App {
    func main() {
        print("Hello")
    }
}

AThe @main attribute cannot be used on a class.

BThe main() method must be static.

CThe print statement is invalid inside main().

DThe class must be a struct instead.

Step-by-Step Solution

Solution:

Step 1: Check the main() method signature
The @main type must have a static main() method to serve as the entry point.
Step 2: Identify the missing static keyword
Here, main() is an instance method, missing static, causing a compile error.
Final Answer:
The main() method must be static. -> Option B
Quick Check:
main() must be static in @main type [OK]

Quick Trick: Static main() is required inside @main type [OK]

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