Final answer:
Formal English is used in professional or academic settings and follows strict grammar rules, while informal English is casual language used in everyday conversations.
Step-by-step explanation:
Formal English is a style of language used in professional or academic settings, such as in business correspondence, presentations, or essays. It typically follows strict grammar rules, uses complex vocabulary, and avoids contractions or slang. For example, 'It is a pleasure to meet you' is a formal way to greet someone.
Informal English is casual language used in everyday conversations, texts, or social media. It tends to be more relaxed, flexible with grammar rules, and includes contractions, slang, and colloquial expressions. An example of informal English would be 'Nice to meet ya' instead of 'Nice to meet you'.
Learn more about Formal and informal English