Pointers _ golang

package main

import (
    "fmt"
)

func zeroval(ival int) {
    ival = 0
}

func zeroptr(iptr *int) {
    *iptr = 0
}

func main() {

    i := 1
    fmt.Println("initial : ", i)

    zeroval(i)
    fmt.Println("zeroval : ", i)

    zeroptr(&i)
    fmt.Println("zeroptr : ", i)

    fmt.Println("pointer : ", &i)
}

initial :  1
zeroval :  1
zeroptr :  0
pointer :  0x208178170