Swift for-in語句

for-in迴圈遍曆專案集合，例如：數字範圍，數組中的專案或字串中的字元 -

語法

Swift 4編程語言中for-in迴圈的語法是 -

for index in var {
   statement(s)
}

執行流程圖 -

示例代碼

var someInts:[Int] = [10, 20, 30]

for index in someInts {
   print( "Value of index is \(index)")
}

執行上面示例代碼，得到以下結果 -

Value of index is 10
Value of index is 20
Value of index is 30