📘break

🚧 施工中

Swift ⟩ flow control ⟩ control transfer ⟩ break

🧨 雷區

⛔ error: unlabeled 'break' is only allowed inside a loop or switch, a labeled break is required to exit an if or do. ( 👉 see: for...in vs. forEach )

• replit：for...in vs. forEach

(1...10).forEach { n in 
    
    if n > 2 { break }    // ⭐ `break` is inside a "closure"
    //         ^^^^^
    // ⛔ error: 
    //  • unlabeled 'break' is only allowed inside a loop or switch
    //  • labeled 'break' is required to exit an `if` or `do`
}

📘 手冊

• Control Transfer Statements

🚧

• labeled 'break'

• unlabeled 'break'