`Intersection`¶

Returns the sorted intersection of lists.

$ wo 'Intersection[{1, 2, 3, 4}, {2, 4, 6}]'
{2, 4}

$ wo 'Intersection[{a, b, c}, {b, c, d}]'
{b, c}

$ wo 'Intersection[{1, 2, 3}, {4, 5, 6}]'
{}

$ wo 'Intersection[{1, 2, 3}, {1, 2, 3}]'
{1, 2, 3}

$ wo 'Intersection[{1, 2, 3}, {2, 3}, {3}]'
{3}

Unlike Union, an intersection needs at least one argument.

$ wo 'Intersection[]'

Intersection::argm: Intersection called with 0 arguments; 1 or more arguments are expected.
Intersection[]

Intersection¶