Golang string segmentation, substitution and interception

package main

import (
    "fmt"
    "strings"
)

func main() {
    
    str := " Zhao , money , Grandchildren , Li , Zhao "
 
    // String segmentation ,  Use character segmentation 
    str1 := strings.Split(str, ",")
    fmt.Println(str1[0]) // Zhao 
    fmt.Println(str1[1]) // money 
    fmt.Println(str1[2]) // Grandchildren 
    fmt.Println(str1[3]) // Li 
    fmt.Println(str1[4]) // Zhao 
 
    // String substitution , -1 Means replace all , 0 Means not to replace , 1 Replace the first one , 2 Means to replace the second ...
    str2 := strings.Replace(str, " Zhao ", " money ", -1)
    fmt.Println(str2) // money , money , Grandchildren , Li , money 
 
    // String interception ,  A Chinese character 3 Bytes ,  There is also a comma 
    str3 := str[4 : len(str)-4]
    fmt.Println(str3) // money , Grandchildren , Li 
}