Tour of Go 2.0

Zero values

Declare a variable without a value and Go gives it a zero value automatically. No garbage data, no surprises.

  • 0 for numeric types
  • false for booleans
  • "" for strings

This means you never have an uninitialized variable in Go.

main.go ▶ Run in Playground 
package main

import "fmt"

func main() {
	var i int
	var f float64
	var b bool
	var s string
	fmt.Printf("%v %v %v %q\n", i, f, b, s)
}