[Golang] Create a package

A new package must be saved in a file under $Gopath/src

Step: 

1. A new package file name "isEven.go" and save it in a folder with a same name
2. The folder isEven is save under $Gopath/src.
3. The folder isEven Path is  $Gopath/src/isEven
4. Import the package: import "isEven"

Ex.: isEven.go

//package name

package isEven

func IsEven(input int) bool {

        devidedByTwo := true

        if input%2 != 0 {

                devidedByTwo = false

          }

        return devidedByTwo

}

Ex. test.go

package main

import (

        "fmt"

        //import the package

        "isEven"

)

var returnValue bool

func main() {

        i := 20

        if returnValue = isEven.IsEven(i); returnValue != true{

                fmt.Printf("Entered number is an odd.")

                return

        }

        fmt.Printf("Entered number is an even.")

}