Should it be a Capital letter or lowercase letter after an exclamation mark (!)?
For example,
Go ahead! And have a great day.
OR
Go ahead! and have a great day.
The end of a sentence is marked by a full stop (period), exclamation point or question mark. After that, a new sentence begins. All sentences begin with a capital letter.
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The end of a sentence is marked by a full stop (period), exclamation point or question mark. After that, a new sentence begins. All sentences begin with a capital letter.