Meaning
- 1.
square bracket — In a language, a punctuation mark used in the place of the outer parentheses when inserting in another pair of parentheses in parentheses, or when displaying the Chinese characters that correspond to a native word, or when adding explanation, comment, etc., to help understand the original text.
- 2.
square bracket — In math, a sign used to show that a certain expression will be calculated later.