GO语言-基础语法：条件判断

1.IF判断(aa.txt内容：asdfgh。bb.txt内容：12345)

package main

import (
    "io/ioutil"
    "fmt"
)

func main() {
    const filename1, filename2 = "aa.txt", "bb.txt"

    
    contents, err := ioutil.ReadFile(filename1) 
    if err != nil {
        fmt.Println(err)
    } else{
        fmt.Printf("%s\n", contents)
    }
    

    fmt.Printf("%s\n", contents) //打印出filename1的内容

    if contents, err := ioutil.ReadFile(filename2);err != nil {
        fmt.Println(err)
    } else {
        fmt.Printf("%s\n", contents)
    }

    fmt.Printf("%s\n", contents) //还是打印出filename1的内容，filename2在if条件内，跳出IF之后失效（IP内部赋值，只对本次IF有效）
}

打印结果;

asdfgh
asdfgh
12345
asdfgh
[Finished in 0.6s]