Concatenate Float w/ a String

Thanks to the notes here I've replaced my pow(10,iDigs) call to a for loop as follows:

    // Separator = 10 to the power of number of decimal places
    long dSep = 10;
    for (int i = 1; i < iDigs; i++) {
      dSep *= 10;
    }

This allows me to safely pass the number of decimal places as an argument to the function.

Any other ideas?