What is a double negative?

Question:

What is a double negative?

Can anyone give me an example please. Thankyou. X

Best Answer - Chosen by Asker:

In grammar, a double negative would be the use of two words in the same sentence that indicate an opposition to a stated fact. For example, "I don't have nothing" instead of "I don't have anything."

When you use a double negative, you are actually saying the opposite of the message that you are trying to convey. If person says that they don't have "nothing" then they must have "something". Another example would be the sentence "I don't want to not go.", which really means that you want to go, because the don't and not, are both negative terms, and the not reverses the don't.

There's even a mathematical equivalent. When you multiply two negative numbers, the answer is a positive number.