| Case | Base | Prefix | Format | Example |
|---|---|---|---|---|
| HTML/XML Character Entities | decimal | &# | &#nnnn |
© for copyright symbol. Α for Greek capital letter alpha. |
| HTML/XML Character Entities | hexadecimal | &#x | &#xhhhh |
© for copyright symbol. Α for Greek capital letter alpha. |
| CSS Colors | hexadecimal | # | #hhhhhh or #hhh |
#000000 for black, #ffffff for white, #800080 for purple, #808000 for olive, #ffa400 for orange |
| Unicode Code Points | hexadecimal | U+ | U+hhhh, U+hhhhh or U+hhhhhh | |
| Unicode Escape Sequence for Character and String Literals | hexadecimal | \u | \uhhhh |
\u0008 for backspace BS, \u0022 for double quote " \u005c for backslash \ |
| Octal Escape Sequence for Character and String Literals | octal | \ | \ooo |
\10 for backspace BS, \42 for double quote " \134 for backslash \ |
2010-02-08
Prefixes for Place-value Notations
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