> ## Documentation Index
> Fetch the complete documentation index at: https://reportana.dev/llms.txt
> Use this file to discover all available pages before exploring further.

# Others

Besides mathematical, comparison, and logical operators, it is also possible to use a series of additional operators that do not fit into the traditional categories but are widely used to complement the code.

**Other supported operators:**

`|`: Applies a filter to a variable.

*Example of use:*

```twig theme={null}
{{ 'apple'|upper }}
{# Returns 'APPLE' #}
```

`~`: Concatenates two values, usually strings.

*Example of use:*

```twig theme={null}
{{ 'Hello, ' ~ 'World!' }}
{# Returns 'Hello, World!' #}
```

`.`: Accesses a property or method of an object, or an element of an array.

*Example of use:*

```twig theme={null}
{{ order.number }}
{# Accesses the 'number' property of the 'order' object #}
```

`[]`: Accesses a specific element in a sequence (array).

*Example of use:*

```twig theme={null}
{{ fruits[0] }}
{# Accesses the first element of the 'fruits' array #}
```

`?:`: Ternary operator. Returns the value on the left if it is defined and not null; otherwise, returns the value on the right.

*Example of use:*

```twig theme={null}
{{ first_name ?: 'Guest' }}
{# Returns 'Guest' if 'first_name' is not defined or is null #}
```

`??`: Checks if a value is defined and not null; otherwise, returns a default value.

*Example of use:*

```twig theme={null}
{{ order.total_price ?? 'Value not defined' }}
{# Returns 'Value not defined' if 'order.total_price' is not defined or is null #}
```