⇔
Technical information
| Symbol | ⇔ | |
| Name | Left right double arrow | |
| Unicode number | U+21D4 | |
| Category | Double line arrows | |
| Description | The Unicode character ⇔, or U+21D4, is known as the "Left Right Double Arrow". It belongs to the "Arrows" block and falls under the "Symbol, Math" category in the Unicode standard. The symbol depicts two horizontal double arrows pointing in opposite directions, one to the left and one to the right. In mathematics, this symbol is often used to denote an if-and-only-if (iff) statement, suggesting a bijective relationship between two mathematical expressions or elements. It's also frequently used in logic and in computer science. The specific appearance of this symbol can depend on the font and system in use. |
Encoding
| HTML Entity | ⇔ | |
| HTML Entity (hex) | ⇔ | |
| HTML Entity (named) | ⇔ | |
| URL Escape Code | %E2%87%94 | |
| UTF-8 (hex) | 0xE2 0x87 0x94 | |
| UTF-8 (binary) | 11100010:10000111:10010100 | |
| UTF-16 | 0x21D4 | |
| UTF-32 | 0x000021D4 |
Source Code
| C, C++, and Java | "\u21D4" | |
| CSS Code | \21D4 | |
| JavaScript | "\u21D4" | |
| Perl | \x{21D4} | |
| Python 2 | u"\u21D4" | |
| Python 3 | \u21D4 | |
| Ruby | \u{21D4} |
Preview
This Unicode character looks like this ⇔ in sentence and in bold like this ⇔ and in italic like this ⇔.
input-group
Font size:
⇔
12px
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16px
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20px
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28px
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36px
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48px
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72px
CSS Property: font-weight
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100
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200
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300
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400
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500
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600
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700
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800
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900
HTML Forms and Input
input
disabled input
⇔
select
button
button
Code examples in HTML and CSS
<span>⇔</span>
span {
content: "\21D4";
}The symbol in different fonts
⇔
-apple-system
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Apple Color Emoji
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Arial
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BlinkMacSystemFont
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Courier New
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Georgia
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Droid Sans
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Helvetica
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Noto Sans
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Oxygen
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Roboto
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"Segoe UI"
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sans-serif
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Segoe UI Emoji
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Segoe UI Symbol
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system-ui
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Times New Roman
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Ubuntu
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Verdana