Double Integral
∬
UNICODE
U+0222CHEX CODE
∬HTML CODE
∬HTML ENTITY
∬CSS CODE
\222C // html example
<span>∬</span> // css example
span {
content: "\222C";
} ∬
U+0222C∬∬∬\222C // html example
<span>∬</span> // css example
span {
content: "\222C";
}