The Inverted Exclamation Mark symbol (¡). Copy and paste it, or use its Unicode, HTML, and CSS codes.
More from Punctuation.
The quickest way is to copy ¡ from this page and paste it anywhere. You can also insert it with its Unicode, HTML, or alt code listed above.
¡ is U+00A1 (decimal 161).
Use ¡ in HTML to render ¡ on a web page.
On Windows you can type it with Alt+161 (hold Alt and enter the number on the numeric keypad).
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