Either use a full stop "." or an exclamation mark "!", depending on the forcefulness of the command.
Well, in this sentence, a question mark.
full stop
This *might* be referring to end punctuation, i.e. the punctuation mark at the end of a sentence or question. It might be a period, a question mark, an exclamation mark.
A punctuation mark is put at the end of a sentence to denote the conclusion of an idea. The punctuation mark used here is mainly a period. However, if you use a question mark at the end of a sentence, then it is used to denote that the material before the question mark was a question. An exclamation mark is used to add emphasis to the before-stated material.
A comma should follow the closing if there is a colon following the salutation.
Well, in this sentence, a question mark.
A semicolon or a comma can follow the word "however" in a sentence.
The different punctuation at the end of a sentence are mostly period ("."), Question mark ("?"), Exclamation mark ("!").
Punctuation at the end of a sentence indicates a complete thought.
If you are posing a question, use a question mark (?) for punctuation.
Typically, there should be one space after an exclamation mark before starting the next sentence. This follows standard punctuation rules in English writing. However, if the exclamation mark is used within a sentence, there is no need for additional spacing before subsequent punctuation or words.
The missing punctuation mark is a period.
full stop
A comma
An interrogative sentence ends with a question mark.
right brace
A question mark is a punctuation mark used to end an interrogatory sentence.