# Unique Command

From GeoGebra Manual

- Unique[ <List L> ]
- Returns list of elements of list L in ascending order, repetitive elements are included only once. Works for both a list of numbers and a list of text. See also the Frequency command.
**Example:**`Unique[{1, 2, 4, 1, 4}]`

yields*{1, 2, 4}*.`Unique[{"a", "b", "Hello", "Hello"}]`

yields*{"'Hello", "a", "b"}*.

## CAS Syntax

- Unique[ <List L> ]
- Returns a list where each element of L occurs only once.
**Example:**`Unique[{1, x, x, 1, a}]`

yields*{1, x, a}*.