What Are the Proper Uses of the Exclamation Mark [!]

1. Exclamation marks are put after heavily-stressed, usually high-pitched sentences, clauses, phrases, words or interjections.

The rain is coming!
If you wish!
In the bag!
Car!
Wow!

2. Exclamation marks are inside quoted exclamations and outside when the quoted part is only a part of a non-exclamation.

I said, "I love you"!
The robber came and said, "Give that to me!"

3. Exclamation marks at the end of sentences should not be followed with other any other punctuation mark.

The leader shouted, "Go!" This is why all of them came and rushed.

4. Exclamation marks can be followed by a comma if not at the end of the sentence.

"Come!," said the driver.

5. Exclamation marks can substitute commas or semicolon when needed.

The dancers shouted words like, "Fight!" "Go!" "Move!"