Go by Example - If/Else

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翻译自 https://gobyexample.com/

Go by Example

Go is an open source programming language designed for building simple, fast, and reliable software.

Go by Example is a hands-on introduction to Go using annotated example programs. Check out the first example or browse the full list below.

Go by Example: If/Else

goalng中的if条件语句可以省略括号，但是大括号不能少。而且golang没有常用的三元运算符?:, 所以必须用if来实现。

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package main

import "fmt"

func main() {
    // 经典的if／else
    if 7%2 == 0 {
        fmt.Println("7 is even")
    } else {
        fmt.Println("7 is odd")
    }

    // if
    if 8%4 == 0 {
        fmt.Println("8 is divisible by 4")
    }

    // 条件判断语句前可以执行一条语句（简直酷毙了），并且定义的变量可以在所有条件分支引用
    if num := 9; num < 0 {
        fmt.Println(num, "is negative")
    } else if num < 10 {
        fmt.Println(num, "has 1 digit")
    } else {
        fmt.Println(num, "has multiple digits")
    }
}
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$ go run if-else.go 
7 is odd
8 is divisible by 4
9 has 1 digit

原文链接：Go by Example: If/Else