A, HTML in:
The character string "21st" want to set superscript st, in html tag is 21 <sup> st </ sup >
two, C # editor
you can use the unicode super / subscripts, such as:
O2 = var "O ₂"; // or "O \ x2082"
var Unit2 = "unit²"; // or "Unit \ xB2"
var = 1-m "m-1"; 1 // m-th power minus "m \ u207B \ u00B9 "- number is: u207B look at the horizontal axis 207, looking at the vertical coordinates B, taken together (Unicode characters)
Please refer to the table at the following URL: https://en.wikipedia.org/wiki/Unicode_subscripts_and_superscripts
The most common superscript digits (1, 2, and 3) were in ISO-8859-1 and were therefore 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 these characters. 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; the one on the right contains the equivalents using HTML markup for the subscript or superscript. Gray cells are reserved for future use, white cells are other characters from Latin-1.
You can also directly modify the copy inside the character in the program.
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
| U+00Bx | x² | x³ | x¹ | |||||||||||||
| In 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 | xₕ | xₖ | xₗ | xₘ | xₙ | xₚ | xₛ | xₜ |
| 0 | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | A | B | C | D | E | F | |
| U+00Bx | the X- 2 | x3 | x1 | |||||||||||||
| In 207x + | x0 | the X- i | X 4 | x 5 | x6 | x7 | x8 | x 9 | x+ | x− | x= | x( | x) | xn | ||
| U+208x | x0 | x1 | the X- 2 | x3 | X 4 | x 5 | x6 | x7 | x8 | x 9 | x+ | x− | x= | x( | x) | |
| U+209x | x a | x f | xo | xx | x g | x h | xk | xl | xm | xn | xp | xs | xt |
Other superscript and subscript characters
Unicode also includes subscript and superscript characters that are intended for semantic usage, in the following blocks:
- The Latin-1 Supplement block contains the feminine and masculine ordinal indicators ª and º.
- The Combining Diacritical Marks block contains medieval superscript letter diacritics. These letters are written directly above other letters appearing in medieval Germanic manuscripts, and so these glyphs do not include spacing, for example uͤ. They are shown here over a long string of periods: ....ͣ...ͤ...ͥ...ͦ...ͧ...ͨ...ͩ...ͪ...ͫ...ͬ...ͭ...ͮ...ͯ..
- The Combining Diacritical Marks Supplement block contains additional medieval superscript letter diacritics, enough to complete the basic lowercase Latin alphabet except for q and y, a few small capitals and ligatures (ae, ao, av), and additional letters.
- The Spacing Modifier Letters block has superscripted letters and symbols used for phonetic transcription: ʰ ʱ ʲ ʳ ʴ ʵ ʶ ʷ ʸ ˀ ˁ ˠ ˡ ˢ ˣ ˤ.
- The Phonetic Extensions block has several sub- and super-scripted letters and symbols: ᴬ ᴭ ᴮ ᴯ ᴰ ᴱ ᴲ ᴳ ᴴ ᴵ ᴶ ᴷ ᴸ ᴹ ᴺ ᴻ ᴼ ᴽ ᴾ ᴿ ᵀ ᵁ ᵂ ᵃ ᵄ ᵅ ᵆ ᵇ ᵈ ᵉ ᵊ ᵋ ᵌ ᵍ ᵎ ᵏ ᵐ ᵑ ᵒ ᵓ ᵔ ᵕ ᵖ ᵗ ᵘ ᵙ ᵚ ᵛ ᵜ ᵝ ᵞ ᵟ ᵠ ᵡ ᵢ ᵣ ᵤ ᵥ ᵦ ᵧ ᵨ ᵩ ᵪ ᵸ.
- The Phonetic Extensions Supplement block has a few more: ᶛ ᶜ ᶝ ᶞ ᶟ ᶠ ᶡ ᶢ ᶣ ᶤ ᶥ ᶦ ᶧ ᶨ ᶩ ᶪ ᶫ ᶬ ᶭ ᶮ ᶯ ᶰ ᶱ ᶲ ᶳ ᶴ ᶵ ᶶ ᶷ ᶸ ᶹ ᶺ ᶻ ᶼ ᶽ ᶾ ᶿ.
Consolidated, the Unicode standard defines complete sub- and super-scripts for numbers and common mathematical symbols ( ⁰ ¹ ² ³ ⁴ ⁵ ⁶ ⁷ ⁸ ⁹ ⁺ ⁻ ⁼ ⁽ ⁾ ₀ ₁ ₂ ₃ ₄ ₅ ₆ ₇ ₈ ₉ ₊ ₋ ₌ ₍ ₎ ), a full superscript Latin lowercase alphabet except q ( ᵃ ᵇ ᶜ ᵈ ᵉ ᶠ ᵍ ʰ ⁱ ʲ ᵏ ˡ ᵐ ⁿ ᵒ ᵖ ʳ ˢ ᵗ ᵘ ᵛ ʷ ˣ ʸ ᶻ ), a limited uppercase Latin alphabet ( ᴬ ᴮ ᴰ ᴱ ᴳ ᴴ ᴵ ᴶ ᴷ ᴸ ᴹ ᴺ ᴼ ᴾ ᴿ ᵀ ᵁ ⱽ ᵂ ), a few subscripted lowercase letters ( ₐ ₑ ₕ ᵢ ⱼ ₖ ₗ ₘ ₙ ₒ ₚ ᵣ ₛ ₜ ᵤ ᵥ ₓ ), and some Greek letters ( ᵅ ᵝ ᵞ ᵟ ᵋ ᶿ ᶥ ᶲ ᵠ ᵡ ᵦ ᵧ ᵨ ᵩ ᵪ ). Note that since these characters come from different ranges, they may not be of the same size and position, depending on the typeface.