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package main
import (
"fmt"
"unicode/utf8"
)
func main() {
s := "hello 你好" // 8 = 5个字符 + 1个空格 + 2个汉字
fmt.Println("len(s):", len(s)) // len(s): 12
var str = "hello 你好"
//golang中string底层是通过byte数组实现的，直接求len 实际是在按字节长度计算 所以一个汉字占3个字节算了3个长度
fmt.Println("len(str):", len(str))
//以下两种都可以得到str的字符串长度
//golang中的unicode/utf8包提供了用utf-8获取长度的方法
fmt.Println("RuneCountInString:", utf8.RuneCountInString(str))
// 通过rune类型处理unicode字符
fmt.Println("rune:", len([]rune(str)))
}
