U+2400 "␀" Symbol for Null Unicode Character
Unicode Version 17.0
␀
U+2400 "␀" Symbol for Null is a graphic representation of the ASCII control character NUL, which has a code point of 0 in the ASCII standard. It is typically depicted as the letters "NUL" enclosed within a rounded rectangle or bubble, a design intended for use in control character pictures or circuit diagrams to visually indicate a null value or empty state. This symbol belongs to the Control Pictures block of Unicode, which was created to provide visible icons for nonprinting control characters used in telecommunication and data transmission protocols.
General Properties
| Code Point | U+2400 |
| Version Added | 1.1 |
| Name | Symbol for Null |
| Unicode 1.0 Name | Graphic for Null |
| Block | Control Pictures |
| General Category | Other Symbol |
| Canonical Combining Class | Not Reordered |
| Bidirectional Class | Other Neutral |
Encodings
| HTML Decimal Encoding | ␀ |
| HTML Hex Encoding | ␀ |
| UTF-8 Encoding | 0xE2 0x90 0x80 |
| UTF-16 Encoding | 0x2400 |
| UTF-32 Encoding | 0x00002400 |
| C/C++/Java Escape | \u2400 |
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 | Alphabetic |
| Script | Common |
| Script Extensions | Common |
| Indic Syllabic Category | Other |
| Pattern Syntax | Yes |
| Vertical Orientation | Upright |
| Grapheme Base | Yes |
| Grapheme Cluster Break | Other |
| Word Break | Other |
| Sentence Break | Other |