Conversion of data formats
This worksheet is focused on the preliminary work of conversion of data formats. As we work with encryption, we will want to put messages in a number of different formats. We first want to convert back and forth between normal text and strings of numbers. For reasons that will become apparent later we will also want to be able to convert the numbers between decimal, binary, and hexidecimal formats. Finally we want to be able to concatonate the hex numbers into blocks
