> For the complete documentation index, see [llms.txt](https://docs.wem.io/platform/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.wem.io/platform/wemtipsandtricks/expressions/order-of-operators.md).

# Order of Operators

In expressions you use operators to perform operations or calculations with your data. In what order these operations are performed is depending on the operator precedence or priority. WEM also uses the order of operators to evaluate expressions. 

Properly using the priority of your operators can reduce the amount of brackets needed in an expression and make them much more readable. Below you will find a list with the priority of every operator, from highest precedent (calculated first) to lowest precedent (calculated last). Some keywords also have a priority in the right context you can also find those in this list.

| Operator                                                                                                                               | Symbol        | Prioriteit |
| -------------------------------------------------------------------------------------------------------------------------------------- | ------------- | ---------- |
| [IfUnknown](/platform/wemreference/operators/if-unknown.md)                                                                            | ?             | 9          |
| [Division  ](/platform/wemreference/operators/division.md)                                                                             | \\            | 8          |
| [Modulo  ](/platform/wemreference/operators/modulo.md)                                                                                 | %             | 8          |
| [Multiplication  ](/platform/wemreference/operators/multiplication.md)                                                                 | \*            | 8          |
| [Addition  ](/platform/wemreference/operators/addition.md)                                                                             | +             | 7          |
| [Subtraction  ](/platform/wemreference/operators/subtraction.md)                                                                       | -             | 7          |
| [Ancestor Of  ](/platform/wemreference/keywords/concepts/ancestor-of.md)                                                               | ancestor of   | 6          |
| [Descendant Of ](/platform/wemreference/keywords/concepts/descendant-of.md)                                                            | descendant of | 6          |
| [Child Of  ](/platform/wemreference/keywords/concepts/child-of.md)                                                                     | child of      | 6          |
| [Parent Of  ](/platform/wemreference/keywords/concepts/parent-of.md)                                                                   | parent of     | 6          |
| [Contains  ](/platform/wemreference/keywords/contains.md)                                                                              | contains      | 6          |
| [StartsWith  ](/platform/wemreference/keywords/text/starts-with.md)                                                                    | starts with   | 6          |
| [Equality  ](/platform/wemreference/operators/equality.md)                                                                             | =             | 6          |
| [GreaterThan](/platform/wemreference/operators/greater-than.md)[(OrEqual) ](/platform/wemreference/operators/greater-than-or-equal.md) | > >=          | 6          |
| [LessThan](/platform/wemreference/operators/less-than.md)[(OrEqual)](/platform/wemreference/operators/less-than-or-equal.md)           | < <=          | 6          |
| [Unequality  ](/platform/wemreference/operators/unequality.md)                                                                         | <>            | 6          |
| [In  ](/platform/wemreference/keywords/lists/in.md)                                                                                    | in            | 5          |
| [Overlaps  ](/platform/wemreference/keywords/concepts/overlaps.md)                                                                     | overlaps      | 5          |
| [LogicalAnd  ](/platform/wemreference/operators/logical-and.md)                                                                        | & and         | 4          |
| [LogicalOr ](/platform/wemreference/operators/logical-or.md)                                                                           | \| or         | 3          |
| [Where  ](/platform/wemreference/keywords/lists/where.md)                                                                              | where         | 2          |
| [Inversion  ](/platform/wemreference/operators/inversion.md)                                                                           | -             | 1          |
| [LogicalNot  ](/platform/wemreference/operators/logical-not.md)                                                                        | ! not         | 1          |
| [Of  ](/platform/wemreference/keywords/lists/of.md)                                                                                    | of            | 1          |


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