# toString
toString

`toString` formats the input expression as a string. `toString` skips rows containing null values.

## Syntax


```
toString(expression)
```

## Arguments


 *expression*   
 An expression can be a field of any data type, a literal value like **14.62**, or a call to another function that returns any data type.

## Return type


String

## Example


The following example returns the values from `payDate` (which uses the `date` data type) as strings.

```
toString(payDate)
```

The following are the given field values.

```
payDate
--------
1992-11-14T00:00:00.000Z
2012-10-12T00:00:00.000Z
1973-04-08T00:00:00.000Z
```

For these field values, the following rows are returned.

```
1992-11-14T00:00:00.000Z
2012-10-12T00:00:00.000Z
1973-04-08T00:00:00.000Z
```