: Unicode character recognition.

Unicode character information

Digit zero

Displayed on your computer as: 0
(if the character is not rendered properly, you may not have the appropriate fonts)

Unicode name: Digit zero
Alternative names: Codepoint (hexadecimal): 0x0030
Codepoint (decimal): 48
In unicode block: Basic Latin

Html entities:

0 or 0

Character input:

There is no universal input system for Unicode characters. But you can use the system specific input methods below.

WindowsHold down Alt and press + on the numeric keyboard. Type: 0030 and release Alt. A registry key needs to be enabled for this to work. See Unicode input (wikipedia) for more details.
Linux: Hold down Crtl and ⇧ Shift and type U0030. Now press ↵ Enter and release Crtl and ⇧ Shift.

Other Infos:

General category: Nd (Decimal_Number): A decimal digit.
Bidirectional class is: EN (European_Number): Any ASCII digit or Eastern Arabic-Indic digit.
Canocial combining class is: 0 (Not_Reordered): Spacing and enclosing marks; also many vowel and consonant signs, even if nonspacing.