Help with "Shorthand Variable Declaration" in Go Lang

package main



import "fmt"



func main() {



    // full style variable declaration

        var quantity int



        // after confirming with user

        quantity = 4



        length, width := 1.4, 1.2





        var customerName = "John Wick"



        fmt.Println(customerName)

        fmt.Println("has ordered", quantity, "towels")

        fmt.Println("each with area of")

        fmt.Println(length*width, "square feet")



}