Approximately Equal To ≈

The Approximately Equal To character (≈) is a standard HTML entity defined in the HTML specification. In HTML source code, it can be written using the named entity reference ≈, the decimal numeric character reference ≈, or the hexadecimal numeric reference ≈. The character is assigned Unicode code point U+2248 in the Universal Character Set.

The approximately-equal symbol is an alias for the almost-equal-to character (≈), using the HTML5 named entity ≈. Both ≈ and ≈ produce the same double-tilde character. This entity name may be more intuitive for developers who think in terms of 'approximate' rather than 'asymptotic.'

Mathematical HTML entities enable web authors to display proper mathematical notation without relying on images or specialized rendering libraries like MathJax or KaTeX. While complex equations and multi-line formulas may still benefit from dedicated math typesetting tools, individual symbols expressed as HTML entities render quickly, remain accessible to screen readers, and can be styled with CSS just like regular text content.

When deciding how to encode the Approximately Equal To character in your HTML documents, the named entity ≈ is generally the most readable choice for developers reviewing or maintaining source code. The decimal form ≈ and hexadecimal form ≈ are equally valid alternatives that work in contexts where named entities may not be supported, or when generating HTML output programmatically from server-side code. All three representations produce identical visual output in every modern web browser.

Use ≈ interchangeably with ≈ for approximate equality in mathematical and scientific content. The choice between the two entity names is purely stylistic — both resolve to the same Unicode character U+2248. Use whichever name is more readable in your HTML source code.