U+0000 "NUL" NULL Unicode Character
Unicode Version 17.0
NUL
U+0000 "NUL" NULL is a control character originally inherited from ASCII, where it represents the null character used to signify no data or a terminator in many programming contexts, such as marking the end of a string in C. In Unicode, it is a valid code point, though it is not a printable glyph; its purpose remains largely technical, employed for padding, flow control, or as a placeholder in communications protocols. Despite its name, it does not represent the concept of "nothingness" in a mathematical sense but rather serves as a defined instruction for processing systems.
General Properties
| Code Point | U+0000 |
| Version Added | 1.1 |
| Unicode 1.0 Name | Null |
| Block | Basic Latin |
| General Category | Control |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Boundary Neutral |
| Alias | NUL (abbreviation) NULL (control) |
Encodings
| HTML Decimal Encoding | � |
| HTML Hex Encoding | &#x; |
| UTF-8 Encoding | 0x00 |
| UTF-16 Encoding | 0x0000 |
| UTF-32 Encoding | 0x00000000 |
| C/C++/Java Escape | \u0000 |
Unicode Properties
| NFC Quick Check | Yes |
| NFD Quick Check | Yes |
| NFKC Quick Check | Yes |
| NFKD Quick Check | Yes |
| Numeric Type | None |
| Numeric Value | NaN |
| Line Break | Combining Mark |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Vertical Orientation | Rotated |
| Grapheme Cluster Break | Control |
| Word Break | Other |
| Sentence Break | Other |