From Wikipedia, the free encyclopedia
Unicode has
subscripted and superscripted versions of a number of
characters including a full set of arabic numerals. These characters allow
any polynomial, chemical
and certain other equations to be represented in plain text
without using any form of markup like HTML or T_{E}X. With the exception of
using "²" and "³" for squared and cubed units it is considered
inadvisable to use these characters when other methods of
superscript and subscript are available.
The difference between subscript/superscript and
numerator/denominator glyphs. In many popular fonts the Unicode
"subscript" and "superscript" characters are actually numerator and
denominator glyphs. The typeface is Myriad Pro.
Note as well that most fonts that include these characters use
them for mathematical numerator and denominator glyphs,
which are smaller than normal characters but are aligned with the
cap line and the baseline,
respectively. When used with the solidus, these glyphs are useful for making
arbitrary diagonal fractions (similar to the ½ glyph), but are not substitutes
for properly aligned small digits. Another Unicode character, the
fraction slash ⁄ is visually similar to the
solidus, but when used with the ordinary digits (not the
superscripts and subscripts) can indicate to a layout system that a
fraction, such as 11⁄12, is preferred.
The most common superscript digits were in ISO88591 at positions
B9_{HEX},
B2_{HEX} and B3_{HEX} for digits 1, 2, and 3
respectively and have therefore been carried over into those
positions in the Latin1 range of Unicode. The rest were placed in
a dedicated section of Unicode at U+xxxx2070 to U+209F. The two tables below show
the characters in this range. Each superscript or subscript
character is preceded by a normal x to show the
subscripting/superscripting. The table on the left contains the
actual Unicode characters (which may not render correctly in your
browser); the one on the right contains the equivalents using HTML
markup for the subscript/superscript.
Unicode 

0 
1 
2 
3 
4 
5 
6 
7 
8 
9 
A 
B 
C 
D 
E 
F 
U+207x 
x⁰ 
xⁱ 


x
⁴ 
x⁵ 
x⁶ 
x⁷ 
x⁸ 
x⁹ 
x⁺ 
x⁻ 
x⁼ 
x⁽ 
x⁾ 
xⁿ 
U+208x 
x₀ 
x
₁ 
x
₂ 
x
₃ 
x
₄ 
x₅ 
x₆ 
x₇ 
x₈ 
x₉ 
x₊ 
x₋ 
x₌ 
x₍ 
x₎ 

U+209x 
xₐ 
xₑ 
xₒ 
xₓ 
xₔ 











U+bx 


x² 
x³ 





x¹ 







HTML 

0 
1 
2 
3 
4 
5 
6 
7 
8 
9 
A 
B 
C 
D 
E 
F 
U+207x 
x^{0} 
x^{i} 


x^{4} 
x^{5} 
x^{6} 
x^{7} 
x^{8} 
x^{9} 
x^{+} 
x^{−} 
x^{=} 
x^{(} 
x^{)} 
x^{n} 
U+208x 
x_{0} 
x_{1} 
x_{2} 
x_{3} 
x_{4} 
x_{5} 
x_{6} 
x_{7} 
x_{8} 
x_{9} 
x_{+} 
x_{−} 
x_{=} 
x_{(} 
x_{)} 

U+209x 
x_{a} 
x_{e} 
x_{o} 
x_{x} 
x_{ə} 











U+bx 


x^{2} 
x^{3} 





x^{1} 







References