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Puzzle 21 Explanation: init Is Special

Puzzle 21 Explanation: init Is Special

Understand how init works in Go.

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Try it yourself

Try executing the code below to see the result for yourself.

Go (1.16.5)
package main
import (
	"fmt"
)
func init() {
	fmt.Printf("A ")
}
func init() {
	fmt.Print("B ")
}
func main() {
	fmt.Println()
}

Explanation

In Go, init presents a particular case. We cannot define two functions with the same name in the same package in Go compiler. However, init is different.

Go’s documentation describes it like this: “Multiple such functions may be defined per package, ...