---
title: debug.null() function
description: >
  `debug.null()` returns the null value with a given type.
menu:
  flux_v0_ref:
    name: debug.null
    parent: internal/debug
    identifier: internal/debug/null
weight: 201

introduced: 0.179.0
---

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`debug.null()` returns the null value with a given type.



##### Function type signature

```js
(?type: string) => A where A: Basic
```

{{% caption %}}
For more information, see [Function type signatures](/flux/v0/function-type-signatures/).
{{% /caption %}}

## Parameters

### type

Null type.

**Supported types**:
- string
- bytes
- int
- uint
- float
- bool
- time
- duration
- regexp


## Examples

### Include null values in an ad hoc stream of tables

```js
import "array"
import "internal/debug"

array.from(rows: [{a: 1, b: 2, c: 3}, {a: debug.null(type: "int"), b: 5, c: 6}])

```

{{< expand-wrapper >}}
{{% expand "View example output" %}}

#### Output data

| a  | b  | c  |
| -- | -- | -- |
| 1  | 2  | 3  |
|    | 5  | 6  |

{{% /expand %}}
{{< /expand-wrapper >}}