Number of elements in a set.

### Notation

The cardinal of a set E is noted as: n(E).

Some authors also use: card(E). This notation is much less common, however.

### Example

Consider E = {1, 2, 3, 4, 5, 6, 7, 8}; therefore, n(E) = 8

Number of elements in a set.

The cardinal of a set E is noted as: n(E).

Some authors also use: card(E). This notation is much less common, however.

Consider E = {1, 2, 3, 4, 5, 6, 7, 8}; therefore, n(E) = 8