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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                # Swift for-in 循環 Swift for-in 循環用于遍歷一個集合里面的所有元素,例如由數字表示的區間、數組中的元素、字符串中的字符。 ### 語法 Swift for-in 循環的語法格式如下: ``` for index in var { 循環體 } ``` **流程圖:** ![](https://box.kancloud.cn/2015-12-30_568341cc02305.jpg) ### 實例 ``` import Cocoa var someInts:[Int] = [10, 20, 30] for index in someInts { print( "index 的值為 \(index)") } ``` 以上程序執行輸出結果為: ``` index 的值為 10 index 的值為 20 index 的值為 30 ```
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