95% predication interval

Null is a term used in computer programming and database management to indicate the absence of a value or a lack of data. It is often represented as a special value, such as "null" or "nil", and is used to indicate that a variable or database field has no assigned value. In programming, null can be used to check for missing data or to terminate a loop or function. In database management, null can be used to represent missing or unknown data, or to indicate that a field has not yet been filled.