Swift for-in loop
Swift for-in loop to iterate a collection of all the elements which, for example, range from the digital representation of elements in the array, a string of characters.
grammar
Syntax Swift for-in loop as follows:
for index in var { 循环体 }
flow chart:
Examples
import Cocoa var someInts:[Int] = [10, 20, 30] for index in someInts { print( "index 的值为 \(index)") }
The above program execution output is:
index 的值为 10 index 的值为 20 index 的值为 30