# Object.len

## Function

Returns the number of key-value pairs of the object itself.

## Syntax

```bt
object.len()
```

## Parameters

No parameters.

## Return value

| Type | Description |
| ------ | ------ |
| Int | Returns the number of object properties. |

## Example

```bt
user = {name: 'BT', age: 1}
result = user.len()

// Output: 2
print result
```

## Notes

- Only count the key values in the current object.