007_swift_求余与区间与循环

var a=1;
a+=1;
a-=1;
//求余数
8.truncatingRemainder(dividingBy: 2.5)
//闭区间 1到5
for index in 1 ... 5{
    print(index)
}
//左边闭区间右边开区间 1到4
for index in 1 ..< 5{
    print(index)
}
//如果不需要知道内容 index可以替换为_



for item in [1,23,2,13]
{
    print(item)
}
for item in "ada"
{
    print(item)
}