Variable

var {your_variable} type = {your_variable_value}

example:

var variable_01 string = "haha"

var (
    a int
    b float
)

Notice

• variable must be defined first
• go is a static language
• variable should be unique
• If you already defined the variable and you should use it!

Constant

Const will not be modify in runtime
const identifier [type] = value

const (
    a = iota //0
    b        //1
    c        //2
    d = "ha" //ha ，iota += 1
    e        //"ha"   iota += 1
    f = 100  //iota +=1
    g        //100  iota +=1
    h = iota //7 回傳iota數量
    i        //8

    Unknown = 0
    Female  = 1
    Male    = 2
)

Notice

• int const will not store in address，therefore it can not get address through memory