01-－swift之基本运算符

基本运算符

1.赋值

let a = 100

var b = 13

var c = 45

var d = 43

func sum(a: Int,b: Int)->Int{

    return a+b

}

var s = sum(100, b: 200)

print(s)

*/

//元组

/*

var (x,s) = (100, "two")

print(x)

print(s)

2.算术运算

var a = Int(arc4random()%100)

var b = Int(arc4random()%100)

print("a=\(a)")

print("b=\(b)")

var r = a+b

print("a+b=\(r)")

3.自增自减

4.复合运算

var s = 100

s+=100

print(s)

s-=50

print(s)

s*=3

print(s)

s/=2

print(s)

5.比较运算

var a = Int(arc4random()%100)

var b = Int(arc4random()%100)

print("a=\(a)")

print("b=\(b)")

print("a<b=\(a<b)")

class person {

}

var p1 = person()

//var p2 = p1 对象比较的是引用或指针

var p2 = person()

print(p1===p2)//必需要三个等号

6.三目运算

var a = 100

var b = 200

print(a>b ? a:b)

7.区间运算

//...闭区间

for i in 0...10{

print(i)

}

//..<半闭区间

for a in 0..<10{

print(a)

}

8.逻辑运算

var a = 1,b = 2 ,c = 3

var b2 = true

print(!b2)

print(a>b&&b>c)

print(a<b||b>c)