Project Euler #6
In JavaScript:
(function(){
var sumSq = 0, sqSum = 0, total = 0;
for (var i = 1; i < 101; i++){
sumSq += Math.pow(i,2);
total += i;
}
sqSum = Math.pow(total, 2);
document.write("Square of the Sums: ", sqSum, "<br />");
document.write("Sum of the Squares: ", sumSq, "<br />");
document.write("Difference: ", sqSum - sumSq);
})();
on GitHub