Unicode subscripts and superscripts

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Unicode has subscripted and superscripted versions of a number of characters including a full set of arabic numerals. These characters allow any polynomial equation and some other equations to be represented in plain text without using any form of markup like HTML or TEX. It is considered inadvisable to use these characters when other methods of superscript and subscript are available.

The most common superscript digits were in ISO-8859-1 at positions B9HEX, B2HEX and B3HEX for digits 1, 2, and 3 respectively and have therefore been carried over into those positions in the Latin-1 range of Unicode. The rest were placed in a dedicated section of Unicode at U+2070 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.

0 1 2 3 4 5 6 7 8 9 A B C D E F
U+207x x⁰ xⁱ     x⁴ x⁵ x⁶ x⁷ x⁸ x⁹ x⁺ x⁻ x⁼ x⁽ x⁾ xⁿ
U+208x x₀ x₁ x₂ x₃ x₄ x₅ x₆ x₇ x₈ x₉ x₊ x₋ x₌ x₍ x₎  
U+209x xₐ xₑ xₒ xₓ xₔ                      
0 1 2 3 4 5 6 7 8 9 A B C D E F
U+207x x0 xi     x4 x5 x6 x7 x8 x9 x+ x− x= x( x) xn
U+208x x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 x+ x− x= x( x)  
U+209x xa xe xo xx xə                      

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