An example of Informal diction
What is What's up? or That guy told his dad secrets. or Why'd you leave the party so soon?
An example of Formal Diction
What is How are you feeling today? or The man spoke to his father in a low voice so others could not hear. or Would you care to explain the reasoning behind your decision to leave the gathering early?
Informal Diction is referred as.
What is the language used in everyday life?
What is Formal Diction
What is the use of descriptive and precise words that are able to express a sense of politeness and proper feeling for the reader or audience.
This is where Informal Diction would most like be used.
What is Personal letters, emails, or documents that have a conversational tone.
This is where Formal Diction is used.
What is professional texts, formal or academic writing, business and legal settings.