CODEWITHSUNDEEP
go
hawarden_
hawarden_

Reputation: 2170

Call function in Golang

I have a function like this:

var flagvar int
func init() {
    flag.IntVar(&flagvar, "flagname", 1234, "help message for flagname")
}

I want to call it in func main():

func main(){
  init()
}

But it does not work and told me init() is not defined. What's the problem?

Upvotes: 0

Views: 913

Answers (1)

T. Claverie
T. Claverie

Reputation: 12256

The init function is a special function in Golang. It is executed the first time the file is loaded, so you never have to call it directly.

From the official documentation:

Finally, each source file can define its own niladic init function to set up whatever state is required. (Actually each file can have multiple init functions.) And finally means finally: init is called after all the variable declarations in the package have evaluated their initializers, and those are evaluated only after all the imported packages have been initialized.

Upvotes: 6

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