Swift - Basics and Runtime
Which of the following types can be marked with
@main to define the program's entry point?Which of the following types can be marked with @main to define the program's entry point?
easy📝 Conceptual Q2 of 15
Step-by-Step Solution
Solution:
Step 1: Recall @main usage
The@mainattribute can be applied to structs, classes, or enums.Step 2: Confirm allowed types
All three types can provide a staticmain()method to serve as the entry point.Final Answer:
Structs, classes, or enums -> Option DQuick Check:
@main allowed types = struct, class, enum [OK]
Quick Trick: @main works on struct, class, or enum types [OK]
Common Mistakes:
- Thinking only classes can use @main
- Believing enums cannot be entry points
- Assuming @main applies to functions
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