Greek Lunate Epsilon Symbol HTML entity ϵ

ϵ is the HTML entity for Greek Lunate Epsilon Symbol ϵ (U+03F5). Copy ϵ, ϵ and the CSS, JavaScript, Python and URL escapes.

Entity: ϵ
Also written: &straightepsilon; ϵ
Code point: U+03F5
Unicode name: GREEK LUNATE EPSILON SYMBOL
Block: Greek and Coptic
Category: Lowercase letter (Ll)
Since: Unicode 3.1
Defined in: HTML5

Codes to copy

HTML named	`ϵ`Works in HTML; in XML only & < > " ' are predefined.
HTML decimal	`ϵ`Works in HTML and XML.
HTML hex	`ϵ`Works in HTML and XML.
CSS	`content: "\3F5";`In a stylesheet, for ::before and ::after.
JavaScript	`"\u03F5"`Also valid in JSON.
Python	`"\u03f5"`Python 3 string literal.
Python by name	`"\N{GREEK LUNATE EPSILON SYMBOL}"`Readable alternative using the Unicode name.
URL	`%CF%B5`Percent-encoded UTF-8 bytes, for a path or query value.
UTF-8 bytes	`CF B5`2 bytes.
UTF-16	`03F5`1 code unit, which is what JavaScript length counts.

When to use it

ϵ writes U+03F5 (Greek Lunate Epsilon Symbol), a small letter from the Unicode Greek and Coptic block, encoded since Unicode 3.1. In mathematics, single Greek letters are usually set in italic; MathML or a maths font handles that automatically.

The name comes from the HTML5 list (much of it shared with MathML), so it works in every current browser but not in XML or XHTML served as XML, where the numeric reference is the safe choice.

More greek letters

All greek letters · Every HTML entity · Encode or decode text

Source: the WHATWG HTML Standard list of named character references and the Unicode Character Database (Unicode 18.0).