Swift 5.X——输出函数

1.打印相同数据类型 

import UIKit

var a:Int = 1
var b:Int = 2
print(a,b)//1 2
print(a+b)//3

var c:Float = 1.1
var d:Float = 2.2
print(c,d)//1.1 2.2
print(c+d)//3.3000002

var e:String = "hello"
var f:String = "world"
print(e,f)//hello world
print(e+f)//helloworld
print("abcdef\nghijklmn")//abcdef换行ghijklmn

var g:Character = "a"
var h:Character = "b"
print(g,h)
//print(g+h)-error

var i:Bool = true
var j:Bool = false
print(i,j)
//print(i+j)-error 

2.打印不同数据类型

　　打印不同的数据类型有两种方法：其一：在print()函数中增加“,”号（如下）。其二，在print()函数中增加“+”，并需要“字符串拼接”的配合。

import UIKit

var a:Int = 1
var b:Float = 1.2
var c:String = "hello"
var d:Character = "a"
var e:Bool = true

print(a,b,c,d,e)//1 1.2 hello a true