Swift break語句

Swift 4中的break語句用于以下兩種情況：

1. 當需要立即終止循環語句時使用break語句。愛掏網 - it200.com程序控制在循環后的下一條語句繼續執行。愛掏網 - it200.com
2. 也用于終止switch語句中的某個case。愛掏網 - it200.com

在嵌套循環中，break語句終止最內層的循環，并開始執行代碼塊后的下一行。愛掏網 - it200.com

語法

Swift 4中break語句的語法如下：

break 

Swift 4 break語句的流程圖

示例

var index = 10

repeat {
   index = index + 1
   if( index == 25 ){
      break
   }
   print( "Value of index is \(index)")
} while index < 30

輸出：

Value of index is 11
Value of index is 12
Value of index is 13
Value of index is 14
Value of index is 15
Value of index is 16
Value of index is 17
Value of index is 18
Value of index is 19
Value of index is 20
Value of index is 21
Value of index is 22
Value of index is 23
Value of index is 24