3 Answers

It's called a question without a subject.

12 years ago. Rating: 5
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It's called a dash, a minus sign or a hyphen

12 years ago. Rating: 4
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It depends on how it is used.
As a "dash", it would separate thoughts, much as a period or semi-colon.
As a hyphen, it separates two words that, when joined, are NOT a compound word, much as a "semi-colon"
As a "minus sign", it indicates the operation of subtraction in math.   57 - 12 (which represents 45).

12 years ago. Rating: 4
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