golang语言渐入佳境[21]-string类型详解

func main(){

	str := "跟着建勋老师学编程"
	fmt.Println([]byte(str)) // 转换为字节数组
}

func main(){
	str := "跟着建勋老师学编程"
	fmt.Println([]byte(str))
}

\a   U+0007 alert or bell
\b   U+0008 backspace
\f   U+000C form feed
\n   U+000A line feed or newline
\r   U+000D carriage return
\t   U+0009 horizontal tab
\v   U+000b vertical tab
\\   U+005c backslash
\'   U+0027 single quote  (valid escape only within rune literals)
\"   U+0022 double quote  (valid escape only within string literals)

func main(){
	str := "跟着建勋老师学编程"
	fmt.Println(len(str)) //27 总的字节个数   
}

func main(){
	str := "跟着建勋老师学编程"
	fmt.Println(str[20])   //仍然是字节
}

func main(){
	str := "跟着建勋老师学编程"
	fmt.Println(str[3:])  //打印出：着建勋老师学编程
}

func main(){
	str1 := "jonson love "
	str2 :="olaya"
	fmt.Println(str1+str2)  //jonson love olaya
}