In the modern-day, there are a lot of characters defined in different classes. These characters can be letters, numbers, signs, special characters, etc. One of the categorizations of the characters is alphanumeric and non-alphanumeric characters. Non-alphanumeric characters are characters that are not numbers or letters. Non-alphanumeric characters consist of signs and special characters.
Non-alphanumeric Characters
Non-alphanumeric characters are characters except alphanumeric characters. So alphabet and numeric characters are not non-alphanumeric characters. Below you can find a generic list of non-alphanumeric characters.
(blank space)
~ (tilde)
` (grave accent)
! (exclamation mark)
@ (at)
# (pound)
$ (dollar sign)
% (percent)
^ (carat)
& (ampersand)
* (asterisk)
( (open parenthesis)
) (close parenthesis)
_ (underscore)
- (hyphen)
+ (plus sign)
= (equals)
{ (open brace)
} (close brace)
[ (open bracket)
] (close bracket)
| (pipe)
\ (backslash)
: (colon)
; (semicolon)
< (less than)
, (comma)
> (greater than)
. (period)
? (question mark)
/ (forward slash)
Punctuation Characters
The punction characters are part of non-alphanumeric characters.
!
@
#
&
(
)
–
[
{
}
]
:
;
'
,
?
/
*
Symbol Characters
Symbol characters are characters that are symbols like below. The symbol characters are also non-alphanumeric characters.
`
~
$
^
+
=
<
>
“Regex For Non-alphanumeric Characters
Regex is a popular method in order to express specific patterns, characters, etc. The non-alphanumeric characters can be expressed with the following regex.
^[^a-zA-Z0-9]+$