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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                ### 常量的定義 >**const 常量名 常量類型 = value** >**const 常量名 = value** ``` package main import "fmt" func main() { const a int = 123456789 const b = 987654321 fmt.Println(a) // 123456789 fmt.Println(b) // 987654321 } ``` 這個常量類似于變量 ### 常量組的定義 >**使用大量相同的常量** ``` package main import "fmt" const ( a = 3.14 b c d = 100 ) func main() { fmt.Println(a) //3.14 fmt.Println(b) //3.14 fmt.Println(c) //3.14 fmt.Println(d) //100 } ``` ### 常量枚舉 > **列出有窮數列的所有成員,使用特殊常量"iota"來模擬枚舉,iota在const關鍵詞出現時重置為0** ``` package main import "fmt" const ( a = iota // 0 , a = 0 b // 沿用上一行 iota,iota=1,b=1 c = "Hello,word" // iota += 1 ,iota = 2 ,但是c= Hello,word d // iota += 1 ,iota = 3,但是d= Hello,word e = iota // iota += 1 ,iota = 4,e=4 ) func main() { fmt.Println(a) // 0 fmt.Println(b) // 1 fmt.Println(c) // Hello,word fmt.Println(d) // Hello,word fmt.Println(e) // 4 } ``` 我感覺這個枚舉是,把這個iota從第一個開始賦值,iota=0,1,2,3等等,如果變量有賦值,就輸出變量的賦值,沒有就輸出iota的,[iota,.......iota]。
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