# String contains

> Supported in: Batch, Faster, Streaming

**Expression categories:** Boolean, String

## Declared arguments

* **Expression:** Expression to compare.<br>*Expression\<String>*
* **Ignore case:** Boolean to decide if comparison should be case-sensitive or not.<br>*Literal\<Boolean>*
* **Value:** Value to compare against.<br>*Expression\<String>*

**Output type:** *Boolean*

## Examples

### Example 1: Base case

**Argument values:**

* **Expression:** ... Hello world
* **Ignore case:** false
* **Value:** hello

**Output:** false

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### Example 2: Base case

**Argument values:**

* **Expression:** ... Hello world
* **Ignore case:** false
* **Value:** Hello

**Output:** true

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### Example 3: Base case

**Argument values:**

* **Expression:** ... Hello world
* **Ignore case:** true
* **Value:** hello

**Output:** true

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### Example 4: Null case (ANSI mode on)

**Argument values:**

* **Expression:** `expression`
* **Ignore case:** false
* **Value:** `value`

| expression | value | **Output** |
| ----- | ----- | ----- |
| *null* | Hello | *null* |
| hello world | *null* | *null* |
| *null* | *null* | *null* |

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### Example 5: Null case (ANSI mode off)

**Argument values:**

* **Expression:** `expression`
* **Ignore case:** false
* **Value:** `value`

| expression | value | **Output** |
| ----- | ----- | ----- |
| *null* | Hello | false |
| hello world | *null* | false |
| *null* | *null* | false |

***