Swift中常量和变量的区别与声明详解

2020-01-08 23:54:22于海丽

在Swift中,有一种把整型值转换成字符串的方法简单方法:把整型值写到括号中,并且在括号之前写一个反斜杠。如下代码所示:


let japanese = 2
let russian = 3
let japanesedesc = "There are (japanese) japaneses."
let foreignerdesc = "There are (Japanese+ russian) foreigners."

在以上代码中,japanesedesc的值为“There are 2 japaneses.”,foreignerdesc的值为“There are 5 foreigners.”

最后,我们编写下面的程序来巩固在Swift中对常量和变量的声明:


let name = "zzx"
let desc = "My name is "
let namedesc = desc + name
print(namedesc)

let age = 30
var futureage = 0
futureage = age + 5
let info = "After 5 years, my age is (futureage)."
print(info)

程序运行结果为:


My name is zzx 
After 5 years, my age is 35.

总结

以上就是这篇文章的全部内容了,希望本文的内容对大家的学习或者工作具有一定的参考学习价值,如果有疑问大家可以留言交流,谢谢大家对ASPKU的支持。


注:相关教程知识阅读请移步到swift教程频道。