## Issue

I’m supposed to write a formula for the sum of squares using the given function and its parameters. I am allowed to add variables but I can’t seem to get it right. The formula I came up with only computes the summation between the two numbers (not the sum of the squares).

```
int sumOfSquares(int nLowerBound,
int nUpperBound) {
// your code here
int nSum;
nSum = ( (nUpperBound * (nUpperBound + 1)) - (nLowerBound * (nLowerBound - 1)) ) / 2;
return nSum;
}
```

## Solution

The simplest way to compute the sum is to use a loop:

```
int sumOfSquares(int nLowerBound,
int nUpperBound) {
// Initially set the sum as zero
int nSum = 0;
for (int i=nLowerBound; i<=nUpperBound; i++) {
// for each number between the bounds, add its square to the sum
nSum = nSum + i*i;
}
return nSum;
}
```

Answered By – Aziz

Answer Checked By – David Goodson (BugsFixing Volunteer)