Type

• Gerenal Value Type
  • bool
  • int/unit
  • int8/unit8
  • byte/unit8
  • int16/uint16
  • int32/rune
  • int64/uint64
  • float32/float64
  • complex64/complex128
  • uintptr (保存指針)
• Others Value Type
  • array
  • struct
  • string
• Reference Type
  • slice
  • map (key-value)
  • chan (通道)
• interface Type
• func Type

Declarations

var a int
a= 123

var a int =321

var c = 321

d := 456

//忽略
a,_,c,d := 1,2,3,4

轉換

var a float32 =3.14
b:= int(a)

數字轉文字需要導入strconv

import (
     "strconv"
)
var a int = 65
b := strconv.Itoa(a)
// <-->Atoi is int conveter to string.

enum use itoa , 0,1,2,3

const {
     Mon = itoa
     Tue
     Wed
     Thu
}

const {
     _ = itoa
     KB float64 = 1 << (itoa*10)
     MB
     GB
     TB
}