三分钟学 Go 语言——常量+各种类型转换

const identifier [type] = value

const A int = 1
const B = 1
const C, D, E = 1, 1, 1

 const (
  Success = 0
  UnKonw  = 1
  Error   = 2
 )

 //const 出现时被重置为0，每出现一次自动加1
 const (
  F = iota
  G = iota
  H = iota
 )

 const (
  I = iota
  J
  K
 )

 var aInt int = 17

 // 一般用这种方式强制转
 fmt.Printf("转float64 %f  \n", float64(aInt))
 fmt.Printf("转string %v  \n", strconv.Itoa(aInt))
 fmt.Printf("转float64 %f  \n", float64(aInt))[]

转float64 17.000000
转string 17
转float64 17.000000

 resString := fmt.Sprintf("%d %v %v", 1, "coding3min", true)
 fmt.Println(resString)

1 coding3min true

// string  to bytes
 resBytes := []byte("asdfasdf")
 // bytes to string
 resString = string(resBytes)
 fmt.Println(resString)

asdfasdf