# RegexpReplace
The **RegexpReplace** function searches a string for a pattern and replaces all matches with the replacement string. If no matches are found, the original string is returned.
### Syntax
```
RegexpReplace(string, pattern, replacement)
```
Function arguments:
* **string** (required): The string to search.
* **pattern** (required): The pattern to extract with.
* **replacement** (required): String to replace the sought pattern.
> ### 📘When the regular expression you want to use contains a slash, quotation or other special character, you will need to use a backslash (\\) to escape the special character. `Regexp` can vary based on the databases. Check the documentation of your database to find the correct syntax.
### Examples
**Example 1:**
```
RegexpReplace([Product Name], "(\\d+) (\\d+mm)", "\\1-\\2")
```
Replaces every space between digits and digits preceding "mm" with a dash to indicate the range of camera lenses.
**Example 2:**
```
RegexpReplace([Phone Number], "(\\d{3})(\\d{3})(\\d{4})", "(\\1) \\2-\\3")
```
Transforms a phone number to (xxx) xxx-xxxx formatting.
**Example 3:**
```
RegexpReplace([City], "^(.*?),", "San Francisco,")
```
Replaces every character before the comma with the city in proper form.
**Example 4:**
```
RegexpReplace([Team], "[^a-zA-Z0-9\\s]", "")
```
Removes all punctuation marks in a string.
**Example 5:**
```
RegexpReplace([Text], "\\/", "&")
```
Replaces the slash with "&".
