It depends on the context of what you are writing.
This sentence ends with the letter z.
You shouldn't use a preposition when ending a sentence.
Use a period inside the bracket to indicate the sentence inside is ending. Use a period outside of the bracket to indicate that the entire sentence (before the bracketed sentence) has ended.
Write your sentence (then your parenthetical). Use the same punctuation inside the parentheses as you would outside of them and end the sentence with an ending punctuation mark (period).
eadem the ending changes depending on how you use it in a sentence
We'll just have to redo the song's ending until we get it right.
In school sometimes you might feel like a nobody.
A preposition links nouns, pronouns and phrases to other words in a sentence. The word to note here is that a preposition is a link and therefore can not come at the end of a sentance
If you have a topic sentence re-write the topic sentence in the ending and don't pull in any facts!
Proper grammar dictates that you use "are" instead of "is" in this sentence because the word ending is pluralized.
If you are ending a sentence, then yes it would be correct. Unless you want to add dramatic effect to the sentence, then you may want to use a exclamation point (!). Or, if you are asking a question, you will want to use a question mark (?).
Do I need to use a period after the abbreviation of the word etc.? What is the correct punctuation for ending a sentence with etc.?