∈
Element Of
- Unicode
- U+2208
- Category
- Math
- HTML Entity
- ∈
- CSS
- \2208
The Element Of symbol (∈) is a mathematical operator used in set theory to indicate that a specific value or object belongs to a given set. Originally introduced by mathematician Giuseppe Peano in 1889 as a stylized lowercase Greek epsilon, it is now universally recognized in logic and computer science. You will typically see it used in formal equations, technical documentation, or textbooks to express relationships like 'x is an element of set A'.
How to Type
- Windows
- Alt+8712 (on numeric keypad) or Win+. then search 'element of'
- macOS
- Control+Command+Space then search 'element of'
- Linux
- Ctrl+Shift+U then 2208 followed by Space
- HTML
- ∈ or ∈
In Programming
In technical documentation, this symbol is frequently rendered using the LaTeX command `\in`. It is also supported natively as a working set-membership operator in mathematically-oriented programming languages like Julia.
Tags
belongs to
belongs to set
contains
element of set
epsilon symbol math
formal logic symbol
in symbol
mathematics
member of
set membership
set notation
set theory
∈ meaning