# Documentation for infix (cont)

Documentation for infix (cont), assembled from the following types:

# language documentation Sets, Bags, and Mixes

## (Sets, Bags, and Mixes) infix (cont)

multi sub infix:<(cont)>(Any , --> Bool)multi sub infix:<(cont)>(Set , --> Bool)

Returns `True`

if `$a`

**contains** `$b`

as an element.

### infix ∋

only sub infix:<∋>(, --> Bool)

Contains operator (alternate).

Equivalent to (cont), at codepoint U+220B (CONTAINS AS MEMBER).

### infix ∌

only sub infix:<∌>(, --> Bool)

Equivalent to `!(cont)`

, i.e., returns `True`

if `$a`

does not contain `$b`

, at codepoint U+220C (DOES NOT CONTAIN AS MEMBER).