Go Language: Default or zero value

Variables that are declared without initialization are assigned with zero values.

Zero value

a.   0 for numeric types,

b.   false for the boolean type, and

c.    "" (the empty string) for strings.

App.go

package main

import "fmt"

func main() {
 var i int
 var f float64

 var b bool

 var s string

 fmt.Println("i = ", i)
 fmt.Println("f = ", f)
 fmt.Println("b = ", b)
 fmt.Println("s = ", s)

}

Output

i =  0

f =  0

b =  false

s = 

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