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General information

ID 24
HEX 18
Char 
Char type Control
Unicode name
Extended name <control-0018>
Unicode group Basic Latin
Unicode Code Point U+18

Conversion (How to escape )

HTML Entity (decimal) 
HTML Entity (hex) &#x18;
URL Encoded %18
C / C++ / Java "\u18"
Javascript (ASCII) "\x18"
Javascript (UTF-16) "\u0018"
Javascript "\u{18}"
Python u"\u18"
CSS \18
CSS \000018

How to type 

Microsoft Windows ALT code Alt + 24
Microsoft Office write 18 then press Alt + X
Microsoft Office (alternative) write U+18 then press Alt + X
Apple Mac Hold Alt, type 1 8 then release
Apple Mac (alternative) Hold Option, type 1 8 then release
Unix GTK Hold Ctrl + Shift, type u 1 8, then release.
Unix GTK (Alternative) Press Ctrl + Shift + u, type 1 8, then press Enter.

UTF Encodings

UTF-8 (hex) 18
UTF-8 (octal) 30
UTF-8 (binary) 00011000
UTF-16 (hex) 00 18
UTF-16 (octal) 0 30
UTF-16 (binary) 00000000 00011000
UTF-32 (hex) 00 00 00 18
UTF-32 (octal) 000 000 000 030
UTF-32 (binary) 00000000 00000000 00000000 00011000

IMAGE

 Basic Latin Unicode U+18  Basic Latin Unicode U+18