main.go 源码
// Copyright © 2018 Inanc Gumus
// Learn Go Programming Course
// License: https://creativecommons.org/licenses/by-nc-sa/4.0/
//
// For more tutorials : https://learngoprogramming.com
// In-person training : https://www.linkedin.com/in/inancgumus/
// Follow me on twitter: https://twitter.com/inancgumus
package main
func nope() { // block scope starts
// hello and ok are only visible here
const ok = true
var hello = "Hello"
_ = hello
} // block scope ends
func main() { // block scope starts
// hello and ok are not visible here
// ERROR:
// fmt.Println(hello, ok)
} // block scope ends
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