golang作用域问题

//参考 https://segmentfault.com/a/1190000012214571
//参考 https://studygolang.com/articles/2215

func bar()(name string){
	//use p
	fmt.Println("xxx",p)
	for i := 0; i<10; i++{
		var name  =  "test"
		fmt.Println(name)
	}
	//name = "xx"
	fmt.Println("name is ", name)  //此时name为""
	return
	//fmt.Println(*p)
}

//-----------------
//testpointer.go
package main

import (
        "fmt"
)

var p *int

func foo() (*int, error) {
        var i int = 5
        return &i, nil
}

func bar() {
        //use p
        fmt.Println(*p)
}

func main() {
	//var err error
        p, err := foo()  //p, err = foo( )
        if err != nil {
                fmt.Println(err)
                return
        }
        bar()
        fmt.Println(*p)
}