0006 - Project Euler

// 0006.go contains some functions to solve ProjectEuler.net's Problem #6
// https://projecteuler.net/problem=6
package main

import "fmt"

// SumOfSquares calculates the sum of the squares of all natural numbers
// up to the given maxNumber.
func SumOfSquares(maxNum int) int {
    // Initialise the sum of squares variable
    sum := 0

    // Add squares of natural numbers
    for i := 1; i <= maxNum; i++ {
        sum += i*i
    }

    // Return answer
    return sum
}

// SquareOfSum squares the sum of all natural numbers up to the given
// maxNumber.
func SquareOfSum(maxNum int) int {
    // Initialise the sum of all numbers variable
    sum := 0

    // Add natural numbers of variable
    for i := 1; i <= maxNum; i++ {
        sum += i
    }

    // Square sum and return answer
    return sum*sum
}

func main(){
    // Answer the problem
    fmt.Println(SquareOfSum(100)-SumOfSquares(100))
}