# Equals

> Supported in: Batch, Faster, Streaming

Returns true if left and right are equal.

**Expression categories:** Boolean

## Declared arguments

* **Left:** Left expression.<br>*Expression\<ComparableType>*
* **Right:** Right expression.<br>*Expression\<ComparableType>*
* *optional* **Null safe:** Treats nulls as false.<br>*Literal\<Boolean>*

**Output type:** *Boolean*

## Examples

### Example 1: Base case

**Argument values:**

* **Left:** `a`
* **Right:** `b`
* **Null safe:** true

| a | b | **Output** |
| ----- | ----- | ----- |
| 1 | 1 | true |
| 1 | 0 | false |

***

### Example 2: Base case

**Argument values:**

* **Left:** `a`
* **Right:** `b`
* **Null safe:** true

| a | b | **Output** |
| ----- | ----- | ----- |
| 1.0 | 1 | true |
| 1.0 | 0 | false |

***

### Example 3: Base case

**Argument values:**

* **Left:** `departure`
* **Right:** `destination`
* **Null safe:** true

| departure | destination | **Output** |
| ----- | ----- | ----- |
| Heathrow | Heathrow | true |
| Heathrow | Gatwick | false |

***

### Example 4: Null case

**Argument values:**

* **Left:** `departure`
* **Right:** `destination`
* **Null safe:** true

| departure | destination | **Output** |
| ----- | ----- | ----- |
| *null* | *null* | true |
| *null* | Heathrow | false |

***

### Example 5: Null case

**Argument values:**

* **Left:** `departure`
* **Right:** `destination`
* **Null safe:** false

| departure | destination | **Output** |
| ----- | ----- | ----- |
| *null* | *null* | *null* |
| *null* | Heathrow | *null* |

***

### Example 6: Null case

**Argument values:**

* **Left:** `departure`
* **Right:** `destination`
* **Null safe:** *null*

| departure | destination | **Output** |
| ----- | ----- | ----- |
| *null* | *null* | true |
| *null* | Heathrow | false |

***