Null Explained
Null may refer to:
Science, technology, and mathematics
Astronomy
- Nuller, an optical tool using interferometry to block certain sources of light
Computing
- Null (SQL) (or NULL), a special marker and keyword in SQL indicating that something has no value
- Null character, the zero-valued ASCII character, also designated by, often used as a terminator, separator or filler. This symbol has no visual representation.
- Null device, a virtual file that discards data written to it, on Unix systems
/dev/null
- Null pointer or reference (sometimes written
NULL
, nil
, or None
), an object pointer (or reference) not currently set to point (or refer) to a valid object
Mathematics
Physics
Arts and media
People with the surname
See also