在 HTML 代码中使用数学和其他特殊符号

HTML 不包含等式，但它包含一些特殊符号，您可以使用它们来绘制简单的等式、逻辑表达式和其他有趣的结果。此页面列出了用于生成一些有用的特殊符号的代码。

Operations
Name	Symbol	Code
For all	∀	∀
Exists	∃	∃
Not	¬	¬
And	∧	∧
Or	∨	∨
Intersection	∩	∩
Union	∪	∪
Plus/minus	±	±
Minus/plus	∓	∓
Times	×	×
Partial derivative	∂	∂
Solid dot	∙	∙
Middle dot	·	·
Circle times	⊗	⊗
Circle plus	⊕	⊕
Division	÷	÷
Product	∏	∏
Sum	∑	∑
Square root	√	√
Integral	∫	∫
Relations
Contains	∍	∍
Is contained by	∈	∈
Is not contained by	∉	∉
Less than	<	&lt;
Less than or equal to	≤	&le;
Greater than	>	&gt;
Greater than or equal to	≥	&ge;
Congruent	≅	&cong;
Perpendicular	⊥	&perp;
Vertical bar	|	&#124;
Broken vertical bar (pipe)	¦	&brvbar;
Not equal to	≠	&ne;
Equivalent to	≡	&equiv;
Approximately equal to	≈	&asymp;
Similar to	∼	&sim;
Empty set	∅	&empty;
Contains properly	⊃	&sup;
Contains	⊇	&supe;
Not contained in	⊄	&nsub;
Proper subset of	⊂	&sub;
Subset of	⊆	&sube;
Arrows and Brackets
Double arrow	↔	&harr;
Left arrow	←	&larr;
Right arrow	→	&rarr;
Up arrow	↑	&uarr;
Down arrow	↓	&darr;
Double arrow	⇔	&hArr;
Double left arrow	⇐	&lArr;
Double right arrow	⇒	&rArr;
Double up arrow	⇑	&uArr;
Double down arrow	⇓	&dArr;
Double arrow	⇔	&hArr;
Ellipsis	…	&hellip;
Vertical ellipsis	⋮	&vellip;
Left angle quote	‹	&lsaquo;
Left double angle quote	«	&laquo;
Right angle quote	›	&rsaquo;
Right double angle quote	»	&raquo;
Lowercase Greek
Alpha	α	&alpha;
Beta	β	&beta;
Gamma	γ	&gamma;
Delta	δ	&delta;
Epsilon	ε	&epsilon;
Zeta	ζ	&zeta;
Eta	η	&eta;
Theta	θ	&theta;
Iota	ι	&iota;
Kappa	κ	&kappa;
Lambda	λ	&lambda;
Mu	μ	&mu;
Nu	ν	&nu;
Xi	ξ	&xi;
Omicron	ο	&omicron;
Pi	π	&pi;
Rho	ρ	&rho;
Sigma	σ	&sigma;
Tau	τ	&tau;
Upsilon	υ	&upsilon;
Phi	φ	&phi;
Chi	χ	&chi;
Psi	ψ	&psi;
Omega	ω	&omega;
Uppercase Greek
Alpha	Α	&Alpha;
Beta	Β	&Beta;
Gamma	Γ	&Gamma;
Delta	Δ	&Delta;
Epsilon	Ε	&Epsilon;
Zeta	Ζ	&Zeta;
Eta	Η	&Eta;
Theta	Θ	&Theta;
Iota	Ι	&Iota;
Kappa	Κ	&Kappa;
Lambda	Λ	&Lambda;
Mu	Μ	&Mu;
Nu	Ν	&Nu;
Xi	Ξ	&Xi;
Omicron	Ο	&Omicron;
Pi	Π	&Pi;
Rho	Ρ	&Rho;
Sigma	Σ	&Sigma;
Tau	Τ	&Tau;
Upsilon	Υ	&Upsilon;
Phi	Φ	&Phi;
Chi	Χ	&Chi;
Psi	Ψ	&Psi;
Omega	Ω	&Omega;
Editing
Pilcrow (paragraph)	¶	&para;
Section	§	&sect;
Dagger	†	&dagger;
Double dagger	‡	&Dagger;
Superscript 1	¹	&sup1;
Superscript 2	²	&sup2;
Superscript 3	³	&sup3;
Superscript n	ⁿ	&#8319;
Fractions
One half	½	&frac12;
One quarter	¼	&frac14;
Three quarters	¾	&frac34;
Fraction slash	⁄	&frasl;
Example fraction	4⁄5	<sup>4</sup>&frasl;<sub>5</sub>
Currency
Currency	¤	&curren;
Cent	¢	&cent;
Pound	£	&pound;
Euro	€	&euro;
Yen	¥	&yen;
Miscellaneous
Non-breaking space		&nbsp;
Ampersand	&	&amp;
Prime	′	&prime;
Double prime	″	&Prime;
Quote	"	&quot;
Therefore	∴	&there4;
Infinity	∞	&infin;
Degree	°	&deg;
Aleph	ℵ	&alefsym;
Nabla	∇	&nabla;
Registration mark	®	&reg;
Copyright	©	&copy;
Trademark	™	&trade;
Spades	♠	&spades;
Hearts	♥	&hearts;
Clubs	♣	&clubs;
Diamonds	♦	&diams;
Tilde	˜	&tilde;
Bottom quote	‚	&sbquo;
Bottom double quote	„	&#132;
Left quote	‘	&lsquo;
Left double quote	“	&ldquo;
Right quote	’	&rsquo;
Right double quote	”	&rdquo;
Small bullet	•	&#149;
En dash	–	&ndash;
Em dash	—	&mdash;
Micro	µ	&micro;
Inverted question mark	¿	&iquest;
Inverted exclamation point	¡	&iexcl;
Care of	℅	&#8453;
Horizontal bar	―	&#8213;
Triangle bullet	‣	&#8227;
Overline	‾	&oline;
Double exclamation point	‼	&#8252;
Number word	№	&#8470;
Female	♀	&#9792;
Male	♂	&#9794;
Quarter note	♩	&#9833;
Eighth note	♪	&#9834;
Double eighth note	♬	&#9836;
Flat	♭	&#9837;
Sharp	♯	&#9839;
Horizontal tab	A B	&#09;
Female ordinal indicator	ª	&ordf;
Male ordinal indicator	º	&ordm;
Unknown		&#129;
Function	ƒ	&#131;
Permille	‰	&permil;
Hatchek	ˆ	&#136;
Acute accent	´	&#180;
Cedilla	¸	&cedil;
Thorn	þ	&thorn;
Thorn	Þ	&THORN;

如果配置正确，大多数主流浏览器的最新版本应该能够显示这些符号。

如果 Internet Explorer 出现问题，请参阅显示特殊字符或在网上搜索解决方案。