Go-常量-const

常量：只能读，不能修改，编译前就是确定的值

关键字: const

常量相关类型：int8,16,32,64 float32,64 bool string 可计算结果数学表达式

常量方法　　iota

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package main   import "fmt"   func main() {     const name  = "BeinMenChuiXue"     fmt.Println(name)       const (         homeAddr = "earth"         nickName = "WeiLaiShiXuePai"     )     fmt.Println(homeAddr, nickName)       const (         zero = iota         one         two = iota         three     )     fmt.Println(zero, one, two, three)       const (         first = iota         second     )     fmt.Println(first, second)       const (         student = "Golang"         teacher         parents = "S"         children     )     fmt.Println(student, teacher, parents, children) }

　　

观察输出结果，得出以下有关常量特性

　　1. 定义多个常量推荐使用括号　

　　2. iota每往下一行自增1并赋值给这一行的常量，遇到下一个const重新从0开始

　　3. 常量未赋值，往上找最近有值的常量并赋值给自己