# Array.concat

## Function

Merges the current array and subsequent parameters. Array parameters are expanded one level, and non-array parameters are appended element by element.

## Syntax

```bt
array.concat(value1, value2, ...)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| valueN | Any | No | None | Arrays or elements to combine. |

## Return value

| Type | Description |
| ------ | ------ |
| Array | Returns the new merged array. |

## Example

```bt
items = [1, 2]
result = items.concat([3, 4], 5)

// Output: [1,2,3,4,5]
print result
```

## Notes

- The original array will not be modified.