package main

import (
    "fmt"
    "strings"
    "strconv"
)

func main() {
    var str = `
        床前明月光，
        疑是地上霜。
    `
    fmt.Println(str)

    var a = "66666"
    fmt.Println(a)

    fmt.Println(strings.Fields("abc def ghi"))
    //替换两边的a(可以是连续多个a)
    fmt.Println(strings.Trim("aabbaabcbbaa","a"))
    //替换所有a，b
    fmt.Println(strings.Trim("abbaabcbba","ab"))
    //替换左边的ab(可以是连续多个a或b)
    fmt.Println(strings.TrimLeft("abbaabcbba","ab"))
    //替换右边的ab(可以是连续多个a或b)
    fmt.Println(strings.TrimRight("abbaabcbba","ab"))
    fmt.Println(strings.Split("ab,ba,ab,cb,ba",","))
    fmt.Println(strings.Join([]string{"ab", "ba", "ab", "cb", "ba"},","))
    fmt.Println(strings.Repeat("A", 6))
    //-1替换所有，0不替换，大于零的整数n为前n个
    fmt.Println(strings.Replace("aabbccddeeaabb","a", "*", 0))
    //字符串出现的次数
    fmt.Println(strings.Count("abcdabefab", "ab"))
    fmt.Println(strings.ToLower("ABC"))
    fmt.Println(strings.ToUpper("abc"))

    //整数转换字符转
    fmt.Println(strconv.Itoa(1))
    //字符串转换整数（返回两个值：转换后的值和错误）
    fmt.Println(strconv.Atoi("666"))
}

输出：

    床前明月光，
    疑是地上霜。

66666
[abc def ghi]
bbaabcbb
c
cbba
abbaabc
[ab ba ab cb ba]
ab,ba,ab,cb,ba
AAAAAA
aabbccddeeaabb
3
abc
ABC
1
666 <nil>

Process finished with exit code 0