language expert says using  full stop to end sentences in text messages can look rude.  full stop is used in British English; in American English, this punctuation mark is called  period. Linguist Gretchen McCulloch says more and more people think ending messages with  full stop is rude. She said this view is most common in younger people who use instant messaging apps like Twitter and Facebook Messenger. Ms McCulloch said people prefer to send  completely new message instead of ending  sentence with  full stop. She said: "If you're  young person and you're sending a message to someone, the default way to break up your thoughts is to send each thought as  new message."
 full stop dates back around 2,300 years. It is  essential part of writing today. School teachers can put lots of comments in red ink on  student's writing if that student forgets to add the full stop at  end of his or her sentence. However, technology is changing  way we write. Most people now use abbreviations or acronyms in text messages. They might use  acronym 'LOL' instead of writing 'laugh out loud,' or  abbreviation 'fyi' rather than typing 'for your information'. Ms McCulloch says not using  full stop helps  writer save time. She also says that a full stop can make  writer look a little aggressive. Many people prefer to end  sentence with  emoji or emoticon instead of a full stop :-)