# Strlen
Strlen

`strlen` returns the number of characters in a string, including spaces.

## Syntax


```
strlen(expression)
```

## Arguments


 *expression*   
An expression can be the name of a field that uses the string data type like **address1**, a literal value like **'Unknown'**, or another function like `substring(field_name,0,5)`.

## Return type


Integer

## Example


The following example returns the length of the specified string.

```
strlen('1421 Main Street')
```

The following value is returned.

```
16
```