xxxxxxxxxx
package main
import "fmt"
func main(){
var rad float64
const PI float64 = 3.14 // Constant
var area float64
var ci float64
fmt.Print("Enter radius of Circle : ")
fmt.Scanln(&rad)
area = PI * rad * rad
fmt.Println("Area of Circle is : ",area)
ci = 2 * PI * rad
fmt.Println("Circumference of Circle is : ",ci)
}