An exclamation mark usually shows strong feeling, such as surprise, anger or joy. Using an exclamation mark when writing is rather like shouting or raising your voice when speaking. Exclamation marks are most commonly used in writing quoted speech. You should avoid using exclamation marks in formal writing, unless absolutely necessary.
1. Use an exclamation mark to indicate strong feelings or a raised voice in speech:
2. Many interjections need an exclamation mark:
3. A non-question sentence beginning with "what" or "how" is often an exclamation and requires an exclamation mark:
4. In very informal writing (personal letter or email), people sometimes use two or more exclamation marks together:
Remember, try to avoid exclamation marks in formal writing such as an essay or business letter.