以数组举例

//最近迷上了吃鸡。 
var nameArray = ["手枪","散弹枪","冲锋枪","步枪","狙击枪"]
//闭区间运算符   输出 "散弹枪","冲锋枪","步枪","狙击枪"
for name in nameArray[1...4] {
    print(name)
}

//半开区间运算符  输出 "散弹枪","冲锋枪","步枪"
for name in nameArray[1..<4] {
    print(name)
}

//单侧区间 输出 "冲锋枪","步枪","狙击枪"
for name in nameArray[2...] {
    print(name)
}
//输出 "手枪","散弹枪","冲锋枪"
for name in nameArray[...2] {
    print(name)
}
 

哈哈又来了，不准确或者错误的地方望支出，也是第一次这样写东西，自己做个笔记也算是分享。感谢