# bytes.len

## Function

Returns the length in bytes of Bytes.

## Syntax

```bt
bytes(value).len()
```

## Parameters

No parameters.

## Return value

| Type | Description |
|------|------|
| Int | Number of bytes. |

## Code Example

```bt
data = bytes([66, 84])
result = data.len()

// Output: 2
print result
```

## Notes

- `len()` counts raw bytes, not the number of characters.