# Array.map

## Function

Iterate through the array and combine the callback return values into a new array.

## Syntax

```bt
array.map(callback)
```

## Parameters

| Parameters | Type | Required | Default value | Description |
| ------ | ------ | ------ | ------ | ------ |
| callback | Fn | No | Empty | The callback signature is fn(value, index, current). |

## Return value

| Type | Description |
| ------ | ------ |
| Array | Returns the new array after mapping. |

## Example

```bt
items = [1, 2, 3]
result = items.map(fn(value) { value * 2 })

// Output: [2,4,6]
print result
```

## Notes

- The original array will not be modified.