# Convert data to JSON

> Supported in: Batch, Faster, Streaming

Transforms input into json string.

**Expression categories:** File, String

## Declared arguments

* **Input:** Input to be transformed.<br>*Expression\<Array\<AnyType> | Map\<AnyType, AnyType> | Struct>*

**Output type:** *String*

## Examples

### Example 1: Base case

**Argument values:**

* **Input:** `array`

| array | **Output** |
| ----- | ----- |
| \[ hello, world ] | \["hello","world"] |

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### Example 2: Base case

**Argument values:**

* **Input:** `struct`

| struct | **Output** |
| ----- | ----- |
| {<br> **airline**: {<br> **id**: NA,<br>},<br>} | {"airline":{"id":"NA"}} |

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### Example 3: Base case

**Argument values:**

* **Input:** `struct`

| struct | **Output** |
| ----- | ----- |
| {<br> **arr**: \[ {<br> **bin**: MQ==,<br>} ],<br> **inner**: {<br> **bin**: TG9uZG9u,<br>},<br>} | {"inner":{"bin":"TG9uZG9u"},"arr":\[{"bin":"MQ=="}]} |

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### Example 4: Base case

**Argument values:**

* **Input:** `struct`

| struct | **Output** |
| ----- | ----- |
| {<br> **bin**: TG9uZG9u,<br>} | {"bin":"TG9uZG9u"} |
| {<br> **bin**: MQ==,<br>} | {"bin":"MQ=="} |
| {<br> **bin**: MTI=,<br>} | {"bin":"MTI="} |

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### Example 5: Base case

**Argument values:**

* **Input:** `struct_0`

| struct\_0 | **Output** |
| ----- | ----- |
| {<br> **date**: 2021-01-01,<br> **dec32**: 1.12,<br> **dec33**: 0.120,<br> \*\*dec... | {"dec32":1.12,"dec33":0.120,"dec64":10.0000,"timestamp":"2021-01-01T01:01:01.000Z","date":"2021-01-01","struct\_1":{"airline":{"id":"NA"}}} |

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### Example 6: Base case

**Argument values:**

* **Input:** `array`

| array | **Output** |
| ----- | ----- |
| \[ 1.00, 2.10, 36.00 ] | \[1.00,2.10,36.00] |

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### Example 7: Base case

**Argument values:**

* **Input:** `map`

| map | **Output** |
| ----- | ----- |
| {<br> a -> 1,<br> b -> 2,<br>} | {"a":"1","b":"2"} |

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### Example 8: Base case

**Argument values:**

* **Input:** `array`

| array | **Output** |
| ----- | ----- |
| \[ {<br> **airline**: {<br> **id**: NA,<br>},<br>}, *null* ] | \[{"airline":{"id":"NA"}},null] |

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### Example 9: Base case

**Argument values:**

* **Input:** `map`

| map | **Output** |
| ----- | ----- |
| {<br> a -> {<br> **airline**: {<br> **id**: NA,<br>},<br>},<br>} | {"a":{"airline":{"id":"NA"}}} |

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### Example 10: Base case

**Argument values:**

* **Input:** `struct_0`

| struct\_0 | **Output** |
| ----- | ----- |
| {<br> **array\_1**: \[ *null*, *null*, *null* ],<br> **struct\_1**: {<br> **double**: *null*,<br> **string**: *null*,<br>},<br>} | {"struct\_1":{"string":null,"double":null},"array\_1":\[null,null,null]} |
| {<br> **array\_1**: *null*,<br> **struct\_1**: *null*,<br>} | {"struct\_1":null,"array\_1":null} |

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