Okay. I get it. 
When I ran through go playground I missed that type receiver was of pointer 
type, so I was not sure why it didn't print as mentioned in the docs

Thank you
On Thursday, 10 March 2022 at 09:00:49 UTC+5:30 kortschak wrote:

> On Wed, 2022-03-09 at 19:16 -0800, Nikhilesh Susarla wrote:
> > In https://go.dev/doc/effective_go#printing
> > I saw an example for printing our custom string output for the type.
> > The code below is from docs.
> > func (t *T) String() string {
> > return fmt.Sprintf("%d/%g/%q", t.a, t.b, t.c)
> > }
> > fmt.Printf("%v\n", t)
> >
> >
> > But rather the statement should be this right? fmt.Printf("%v\n",
> > t.String())
> > Am I missing something?
> >
>
> When the %v (or %s, %q and others[1]) verbs are used the `String()
> string` is used to construct the printed value.
>
> You can see the logic here[2].
>
> [1]
>
> https://github.com/golang/go/blob/00535b839841227ba60c2de78fbf767088f865bc/src/fmt/print.go#L611
> [2]
>
> https://github.com/golang/go/blob/00535b839841227ba60c2de78fbf767088f865bc/src/fmt/print.go#L623-L628
>
>
>

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