I was given the following question in an interview...

```
Compute the following sum:
1/2 + 1/4 + 1/8 + ... + 1/1048576    

```

I was told that this was a logic question and they weren't looking for the source code, however my answer was the following...

```
    private static double computeSum(){
        double x = 0.0;
        for(double i=2; i<=1048576; i*=2){
            x += (1 / i);
        }
        return x;         
    }

```

What is the correct *logical* answer to this question?