# Logical operators

Logical and comparison operators are used inside `$filter` expressions.

## Operators

| Operator | Meaning | Example |
| --- | --- | --- |
| `eq` | Equal to | `cat_ref eq 'ABC'` |
| `ne` | Not equal to | `cat_ref ne 'ABC'` |
| `gt` | Greater than | `createdOn gt '2025-01-01'` |
| `lt` | Less than | `createdOn lt '2025-01-01'` |
| `ge` | Greater than or equal to | `createdOn ge '2025-01-01'` |
| `le` | Less than or equal to | `createdOn le '2025-01-01'` |
| `and` | Both conditions must match | `cat_ref eq 'A' and cat_title eq 'Products'` |
| `or` | Either condition may match | `cat_ref eq 'A' or cat_ref eq 'B'` |
| `in` | Value is in a list | `cat_ref in ('A','B')` |

## Syntax

```
$filter=PROPERTY_NAME operator VALUE
```

## Examples

```
GET https://api2.saleslayer.com/catalog/Categories?$filter=cat_title eq 'Products' or cat_ref eq 'LPG'
```

```
GET https://api2.saleslayer.com/dam/images?$filter=status eq 'Ok'
```

## Notes

- Use operators with fields whose data type supports the comparison.
- Use metadata and the OpenAPI reference to confirm available fields.
- Parentheses can make complex expressions easier to read and safer to maintain.