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In HTML and XML, a numeric character reference refers to a character by its Universal Character Set/Unicode code point, and uses the format: &#xhhhh;. or &#nnnn; where the x must be lowercase in XML documents, hhhh is the code point in hexadecimal form, and nnnn is the code point in decimal form.
The symbol was first seen in print without the vinculum (the horizontal "bar" over the numbers inside the radical symbol) in the year 1525 in Die Coss by Christoff Rudolff, a German mathematician. In 1637 Descartes was the first to unite the German radical sign √ with the vinculum to create the radical symbol in common use today. [3]
This page lists codes for keyboard characters, the computer code values for common characters, such as the Unicode or HTML entity codes (see below: Table of HTML values"). There are also key chord combinations, such as keying an en dash ('–') by holding ALT+0150 on the numeric keypad of MS Windows computers.
For example, the character é (Small e with acute accent, HTML entity code é) can be obtained by pressing Alt+1 3 0. First press the Alt key (and keep it depressed) with your left hand, then press the digit keys 1 , 3 , 0 , in sequence, one by one, in the right-side numeric keypad part of the keyboard, then release the Alt key.
For codes from 0 to 127, the original 7-bit ASCII standard set, most of these characters can be used without a character reference. Codes from 160 to 255 can all be created using character entity names. Only a few higher-numbered codes can be created using entity names, but all can be created by decimal number character reference.
In the table below, the codes on the left produce the symbols on the right, but these symbols can also be entered directly in the wikitext either by typing them if they are available on the keyboard, by copy-pasting them, or by using menus below the edit windows.
Instead, the University lifted the students’ interim suspensions after pushback from radical faculty, allowing 7 to graduate, restoring 11 to good standing, and leaving 3 with preexisting ...
The radical symbol √ can be used when written on its own, but when part of a larger expression, can be problematic. {} (often seen as {}) is the best way to write such expressions in HTML, but the result is unattractive due to the hole between the overline and the radical symbol in many web browsers: √ 9, 3 √ 27