Diams用HTML怎么编写,HTML Symbols

HTML Symbols

HTML Symbol Entities

HTML entities were described in the previous chapter.

Many mathematical, technical, and currency symbols,

are not present on a normal keyboard.

To add these symbols to an HTML page, you can use an HTML entity name.

If no entity name exists, you can use an entity number; a decimal (or hexadecimal) reference.

If you use an HTML entity name or a hexadecimal number, the character will always display

correctly.

This is independent of what character set (encoding) your page

uses!

Example

I will display €

I will display €

I will display €

Will display as:

I will display €

I will display €

I will display €

Try it Yourself »

Some Mathematical Symbols Supported by HTML

Char

Number

Entity

Description

∀

∀

∀

FOR ALL

∂

∂

∂

PARTIAL DIFFERENTIAL

∃

∃

∃

THERE EXISTS

∅

∅

∅

EMPTY SETS

∇

∇

∇

NABLA

∈

∈

∈

ELEMENT OF

∉

∉

∉

NOT AN ELEMENT OF

∋

∋

∋

CONTAINS AS MEMBER

∏

∏

∏

N-ARY PRODUCT

∑

∑

∑

N-ARY SUMMATION

Some Greek Letters Supported by HTML

Char

Number

Entity

Description

Α

Α

Α

GREEK CAPITAL LETTER ALPHA

Β

Β

Β

GREEK CAPITAL LETTER BETA

Γ

Γ

Γ

GREEK CAPITAL LETTER GAMMA

Δ

Δ

Δ

GREEK CAPITAL LETTER DELTA

Ε

Ε

Ε

GREEK CAPITAL LETTER EPSILON

Ζ

Ζ

Ζ

GREEK CAPITAL LETTER ZETA

Some Other Entities Supported by HTML

Char

Number

Entity

Description

©

©

©

COPYRIGHT SIGN

®

®

®

REGISTERED SIGN

€

€

€

EURO SIGN

™

™

™

TRADEMARK

←

←

←

LEFTWARDS ARROW

↑

↑

↑

UPWARDS ARROW

→

→

→

RIGHTWARDS ARROW

↓

↓

↓

DOWNWARDS ARROW

♠

♠

♠

BLACK SPADE SUIT

♣

♣

♣

BLACK CLUB SUIT

♥

♥

♥

BLACK HEART SUIT

♦

♦

♦

BLACK DIAMOND SUIT