【Go】常量

发表于 分类于 阅读次数： 本文字数： 519 阅读时长 ≈ 1 分钟

  1. const

    1
    2
    3
    4
    5
    6
    7
    8
    // const 定义常量
    const length = 100

    const (
    	SHANGHAI = 1
    	BEIJING  = 2
    	SHENZHEN = 3
    )

  2. iota

    1
    2
    3
    4
    5
    6
    7
    // iota初始值为0 逐行递增 只能在常量中声明
    const (
    	XIAMEN = iota
    	QUANZHOU
    	ZHANGZHOU
    	FUZHOU
    )

  3. 执行结果

    1
    2
    3
    4
    5
    6
    7
    8
    9
    10
    func main() {
    	fmt.Println("length = ", length)
    	fmt.Println("SHANGHAI = ", SHANGHAI)
    	fmt.Println("BEIJING = ", BEIJING)
    	fmt.Println("SHENZHEN = ", SHENZHEN)
    	fmt.Println("XIAMEN = ", XIAMEN)
    	fmt.Println("QUANZHOU = ", QUANZHOU)
    	fmt.Println("ZHANGZHOU = ", ZHANGZHOU)
    	fmt.Println("FUZHOU = ", FUZHOU)
    }