Not Sign
The not sign is the standard symbol for logical negation in mathematics and digital logic, read as not p. It sits inside the Latin-1 range, which is why it has a Windows alt code unlike most logic symbols on this page. Reach for ¬ in equations, formulas and technical writing, where a plain keyboard falls short. It is cataloged at Unicode code point U+00AC in the math set, so it renders the same real text character in every app that supports the font, not a pasted image.
| Symbol | ¬ | |
|---|---|---|
| Unicode | U+00AC | |
| Name | Not Sign | |
| HTML (decimal) | ¬ | |
| HTML (hex) | ¬ | |
| CSS content | \00AC | |
| JavaScript / JSON | \u00AC | |
| UTF-8 bytes | 0xC2 0xAC | |
| UTF-16 units | 0x00AC | |
| Windows alt code | Alt 0172 |
How to type the not sign symbol
- Copy and paste: click the ¬ at the top of this page, then paste with Ctrl+V (Windows) or Cmd+V (Mac). This is the fastest route on any device.
- Windows alt code: hold Alt and type
0172on the numeric keypad, then release Alt. - HTML: write
¬in your markup. - CSS: use
content: "\00AC"in a::beforeor::afterrule. - JavaScript: the escape
\u00ACproduces this character in a string.
Frequently asked questions
How do I copy the not sign symbol?
Click the ¬ above or the copy button and it is placed on your clipboard. Paste it anywhere with Ctrl+V or Cmd+V. It is a real text character, so it works in documents, chats and code.
What is the Unicode code point for not sign?
The not sign has the Unicode code point U+00AC. In HTML you can write it as ¬ or ¬.
What is the alt code for the not sign symbol?
On Windows, hold the Alt key and type Alt 0172 on the numeric keypad, then release Alt. Copying the ¬ from this page is quicker and works on any device.
Does the not sign symbol work everywhere?
In almost every modern app and font, yes. If a font does not include this glyph you may see a placeholder box, but the underlying character U+00AC is still correct and will render in a font that supports it.
Related symbols
Browse the full math symbols hub, or return to the searchable symbol grid.