Go语言类型声明以及转换、默认值

package main

import(
  "fmt"
)

type TestInterface interface{}

func main(){
  a:=65 // char A 's ascii code
  b:=float64(a)
  c:=string(a)
  fmt.Println(a)
  fmt.Println(b)
  fmt.Println(c) // A
  //fmt.Println(c==nil)//error
  var ti TestInterface
  fmt.Println(ti == nil)
  fmt.Println("convert int to string vs string's empty", c=="") //false
  var s string
  fmt.Println("convert int to string vs string's empty", s=="") // true
}