What is the difference between professional and casual communication styles?

The difference between professional and casual communication styles is the professional communication style is expected to be formal while the casual is informal. Professional communication styles are usually used when writing school papers and in correspondence between co-workers and with clients. Casual communication styles are used when writing notes or letters to friends, in text messages, and or social media.

Currently, as of february 2016, an american traveling in france would be by the exchange rate. the weakness of the euro and the strength of the us dollar means that items in france cost less to an american than they otherwise would. of course, if this trend reverses and the us dollar weakens and the euro strengthens, such as was happening in early 2008, an american traveling in france would have an adverse experience because items would cost relatively more.