//geometry.go package main import ( "fmt" "golang-tutorial/geometry/rectangle" //importing custom package ) func main() { var rectLen, rectWidth float64 = 6, 7 fmt.Println("Geometrical shape properties") /*Area function of rectangle package used */ fmt.Printf("area of rectangle %.2f\n", rectangle.Area(rectLen, rectWidth)) /*Diagonal function of rectangle package used */ fmt.Printf("diagonal of the rectangle %.2f ",rectangle.Diagonal(rectLen, rectWidth)) }