[Solved] What is the issue with this Swift program? @main struct Sample { func main() { print("Hello World") } } | Swift

Swift - Basics and Runtime

What is the issue with this Swift program?

@main struct Sample {
    func main() {
        print("Hello World")
    }
}

AThe program is missing an import statement.

BThe struct cannot be marked with @main.

CThe print statement is invalid inside main().

DThe main() method must be static when using @main.

Step-by-Step Solution

Solution:

Step 1: Check main() method signature
When using @main, the main() method must be static.
Step 2: Identify error
Here, main() is an instance method, which is invalid.
Final Answer:
The main() method must be static when using @main. -> Option D
Quick Check:
main() must be static with @main [OK]

Quick Trick: main() must be static in @main type [OK]

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