Go-常量-const
阿新 • • 發佈:2021-11-23
常量:只能讀,不能修改,編譯前就是確定的值
關鍵字: const
常量相關型別:int8,16,32,64 float32,64 bool string可計算結果數學表示式
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) }
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觀察輸出結果,得出以下有關常量特性
1.定義多個常量推薦使用括號
2. iota每往下一行自增1並賦值給這一行的常量,遇到下一個const重新從0開始
3.常量未賦值,往上找最近有值的常量並賦值給自己