Swift for-in语句

for-in循环遍历项目集合，例如：数字范围，数组中的项目或字符串中的字符 -

语法

Swift 4编程语言中for-in循环的语法是 -

for index in var {
   statement(s)
}

执行流程图 -

示例代码

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

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

执行上面示例代码，得到以下结果 -

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