1，if语句
2，switch语句
5
（2）case分支还可以进行区间匹配
9
（3）使用元组匹配（判断属于哪个象限）
10
（4）case中还可以使用where关键字来做额外的判断条件
var
3，for循环语句
3
（2）for-in循环
13
4，while循环语句
7
|
1
2
3
4
5
|
if
count >=3 {
print
(
"yes"
)
}
else
{
"no"
)
}
|
（1）Swift中不需要在case块中显示地使用break跳出switch。如果想要实现C风格的落入特性，可以给需要的case分支插入fallthrough语句
let
fruit =
"apple"
switch
fruit{
case
"apple"
:
"good"
fallthrough
"banana"
,
"orange"
:
"great"
)
default
:
"bad"
)
}
|
| age = 5
age {
case
0...11:
"正太"
12...30:
"少年"
)
:
"大叔"
)
}
|
| point = (2,2)
point {
(0,0):
"坐标在原点"
(_,0):
"坐标在x轴上"
ottom:auto!important; float:none!important; height:auto!important; left:auto!important; line-height:1.5em!important; margin:0px!important; overflow:visible!important; padding:1px 0px!important; position:static!important; right:auto!important; top:auto!important; vertical-align:baseline!important; width:auto!important; font-family:Consolas,_):
"坐标在y轴上"
(-3...3,-3...3):
"坐标在长宽为6的正方形内"
)
:
"在什么地方"
)
}
|
（1）for条件递增循环
for
i=1; i<100; i++ {
"\(i)"
}
|
for
i
in
1..<100{
}
//遍历数组元素
numbers = [1,2,4,7]
num
numbers{
"\(num)"
}
//遍历字典
nameOfAge = [
"lily"
:18,monospace!important; min-height:inherit!important; color:blue!important">"Candy"
:24]
(aName,iAge)
nameOfAge{
"\(aName) is \(iAge)"
)
}
//遍历字符串的字符
@H_316_404@(chare)
}
|
while
i<100 {
i++
repeat{
i++
i<100
|
原文出自： www.hangge.com 转载请保留原文链接： http://www.hangge.com/blog/cache/detail_516.html
