# toLower
<a name="toLower-function"></a>

`toLower` formats a string in all lowercase. `toLower` skips rows containing null values.

## Syntax
<a name="toLower-function-syntax"></a>

```
toLower(expression)
```

## Arguments
<a name="toLower-function-arguments"></a>

 *expression*   
The expression must be a string. It can be the name of a field that uses the string data type, a literal value like **'12 Main Street'**, or a call to another function that outputs a string.

## Return type
<a name="toLower-function-return-type"></a>

String

## Example
<a name="toLower-function-example"></a>

The following example converts a string value into lowercase.

```
toLower('Seattle Store #14')
```

The following value is returned.

```
seattle store #14
```