打破一個迴圈

只要條件保持為真，就會執行迴圈，但你可以使用 break 關鍵字手動停止迴圈。例如：

var peopleArray = ["John", "Nicole", "Thomas", "Richard", "Brian", "Novak", "Vick", "Amanda", "Sonya"]
var positionOfNovak = 0

for person in peopleArray {
    if person == "Novak" { break }
    positionOfNovak += 1
}

print("Novak is the element located on position [\(positionOfNovak)] in peopleArray.")
//prints out: Novak is the element located on position 5 in peopleArray. (which is true)