Question

write a program to find the difference between sum of the squares and square of the sums of n numbers

Answer 1

var n = prompt("Enter n");
if (n == '') {alert('Empty field!');}
else {
var sumOfSquare = 0;
var i;
for (i = 1; i <= n; i++) {
sumOfSquare += i*i;
}
var squareOfSum = n*(n+1)/2;
alert("Difference is " + (sumOfSquare - squareOfSum));
}