To put a Unicode character in HTML,
use &#___; where the
___
is replaced with the decimal value of the unicode character (not hexadecimal).
Since the Unicode content is copyrighted and hence not reproducible here,
a URL is provided:
http://www.unicode.org
Note that all browsers do not support all aspects of Unicode for all values (although some plugins are available). It is recommended that in HTML it is safer to use the HTML symbol sequences, such as:
| HTML Symbol Sequence | Appears as |
|---|---|
| σ | σ |
| Σ | Σ |
| ∑ | ∑ |
| π | π |
| Π | Π |
| ∏ | Π |
| ℵ | ℵ |