# List.Sort

## Syntax

```List.Sort(list as list, optional comparisonCriteria as any) as list
```

Sorts a list of data, `list`, according to the optional criteria specified. An optional parameter, `comparisonCriteria`, can be specified as the comparison criterion. This can take the following values:

• To control the order, the comparison criterion can be an Order enum value. (`Order.Descending`, `Order.Ascending`).

• To compute a key to be used for sorting, a function of 1 argument can be used.

• To both select a key and control order, comparison criterion can be a list containing the key and order (`{each 1 / _, Order.Descending}`).

• To completely control the comparison, a function of 2 arguments can be used. This function will be passed two items from the list (any two items, in any order). The function should return one of the following values:

• `-1`: The first item is less than the second item.
• `0`: The items are equal.
• `1`: The first item is greater than the second item.

Value.Compare is a method that can be used to delegate this logic.

## Example 1

Sort the list {2, 3, 1}.

Usage

``````List.Sort({2, 3, 1})
``````

Output

`{1, 2, 3}`

## Example 2

Sort the list {2, 3, 1} in descending order.

Usage

``````List.Sort({2, 3, 1}, Order.Descending)
``````

Output

`{3, 2, 1}`

## Example 3

Sort the list {2, 3, 1} in descending order using the Value.Compare method.

Usage

``````List.Sort({2, 3, 1}, (x, y) => Value.Compare(1/x, 1/y))
``````

Output

`{3, 2, 1}`