Leading symbols

Is Golang contains a function to lead some string with a given prefix?
For example:

s : = "5"
prefix := "0"
// what I need is - 005, so that lenght of `s` is max 3 characters
// and if `s` is 15 then 015
// and so on

fmt.Sprintf("%03d", 15)

will do the magic. Go read https://gobyexample.com/string-formatting and https://golang.org/pkg/fmt/


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