Go language program to calculate triangle circumference

Following program shows you how to calculate triangle circumference.
This program gets triangle sides from user and calculates circumference and prints it using following formula
Circumference = side1 + side2 + side3

package main

import "fmt"

func main() {

  var triangleSide1 float64
  var triangleSide2 float64
  var triangleSide3 float64
  var circumferenceOfTriangle float64
  fmt.Println("Enter the side1 of triangle:")
  fmt.Scanf("%f", &triangleSide1)
  fmt.Println("Enter the side2 of triangle:")
  fmt.Scanf("%f", &triangleSide2)
  fmt.Println("Enter the side3 of triangle:")
  fmt.Scanf("%f", &triangleSide3)
  circumferenceOfTriangle = triangleSide1 + triangleSide2 + triangleSide3
  fmt.Println("Circumference of triangle is: " , circumferenceOfTriangle)
  }

Output:

Enter the side1 of triangle:
 12
Enter the side2 of triangle:
 18
Enter the side3 of triangle:
 15
Circumference of triangle is:  45