# Sets: set[]

### 4.3.2 Sets: set[]

To define a set of elements, put the elements separated by commas, with delimiters %{ and %} or set[ and ].
Input:

set[1,2,3,4]

or:

%{1,2,3,4%}

Output:

⟦ 1,2,3,4⟧

In the Xcas output, the set delimiters are displayed as ⟦ and ⟧ in order not to confuse sets with lists (see Section 4.3.3). For example, ⟦1,2,3 ⟧is the set %{1,2,3%}, unlike [1,2,3] (normal brackets) which is the list [1,2,3].
Input:

A:=%{1,2,3,4%}

or:

A:=set[1,2,3,4]

Output:

⟦ 1,2,3,4⟧

Input:

B:=%{5,5,6,3,4%}

or:

B:=set[5,5,6,3,4]

Output:

⟦ 5,6,3,4 ⟧

Remark.
The order in a set is not significant and the elements in a set are all distinct. If you input B:=%{5,5,6,3,4%} and C:=%{3,4,5,3,6%}, then B==C will return true.

See Section 5.41 for operations on sets.