HTML character entities are crucial for displaying special symbols and characters not readily available on standard keyboards. These include international characters, mathematical symbols, shapes, and arrows. For instance: ♠ ♣ ♥ ♦ © ®. While UTF-8 encoding generally handles these directly, entities offer solutions when UTF-8 isn’t used, character conflicts arise, or keyboard input is difficult.
Entities in HTML: These directly map to UTF-8 characters. The symbol for Pi (π) can be represented as π or its UTF-8 equivalent. You can find entity codes and UTF-8 index numbers using an HTML Character Entity Reference.
Entities in CSS: Increasingly used with webfont icons and pseudo-elements, CSS requires the UTF-8 number converted to hexadecimal. For Pi (03C0), you’d use
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