Style - Formal / Informal Letters

Informal writing

Also, my dad got me/purchased for me a new mobile telecommunication device/mobile phone. It’s an 8210! Anyway, gotta go/got to cease writing! Speak to you soon. Please write back/please respond swiftly.
Love from
Bob

informal writing is like something you would write in an email or on facebook and all types of social media to your friends and cousins so you would or could use u for you or OMG for Oh My God {gosh}

Formal writing

To finish/In conclusion, I hope you will take my concerns seriously and I look forward to your reply/you writing back to me.

Yours Sincerely

Ms. Kirkpatrick

Formal writing is the complete opposite to informal writing so a this type of writing is use to talk to people like your boss, also for a job application and for very important things and you would use them in letters and you could use them in emails as well as the informal writing. So you basically have to use complex language in your formal writing and also use your manners.