Project Euler #06 - Alternative solution

06-sum-square-difference.v3.go

package main

// Answer: 25164150
// Find the difference between the sum of the squares
// of the first one hundred natural numbers and the square of the sum.
import (
	"fmt"
	"math"
)

func main() {
	a := make(chan int)
	b := make(chan int)
	go func() {
		a <- sumOfSquare(100)
		close(a)
	}()
	go func() {
		b <- squareOfSum(100)
		close(b)
	}()
	fmt.Println(<-b - <-a)
}

func sumOfSquare(n int) int {
	return ((n * (n + 1)) * (2 * n + 1)) / 6
}
func squareOfSum(n int) int {
	count := (n * (n + 1)) / 2
	return int(math.Pow(float64(count), 2))
}