# Check Regex Match ## Overview This operation checks if a text conforms to a regular expression pattern. It serves as a conditional check, allowing you to perform additional operations depending on the truth of the statement. ## Syntax This operation has two different formats. You can use either **is matched by** or **matches** to refer to the regular expression check. #### 1. Option 1 ``` the text is "{input}" the regular expression is "{regex}" if the text matches the regular expression then {action} ``` #### 2. Option 2 ``` the text is "{input}" the regular expression is "{regex}" if the text is matched by the regular expression then {action} ``` ## Data The table below lists the names of the data elements in this operation and indicates which can be renamed in the syntax. | Data Name | Can Be Renamed | | ---------------------- | -------------- | | the text | Yes | | the regular expression | No | ## Parameters **Parameters** are placeholders for data. Refer to the table below for details on each parameter in this operation. In the syntax, replace parameters with your own values.

Parameter	Description	Examples	Required
`input`	An input text to be checked against the regular expression.	user123 Welcome to Kognitos.	Yes
`regex`	A regular expression that defines the criteria the text must match.	^[a-zA-Z0-9]+$ ^\d3$	Yes
`action`	An operation that occurs if `input` conforms to the regular expression.	say "The username contains only letters and numbers."	Yes

## Examples #### 1. Validate Username Format {% tabs %} {% tab title="Automation" %}

the username is "user123"
the regular expression is "^[a-zA-Z0-9]+$"
if the username matches the regular expression then
  say "The username contains only letters and numbers."

{% endtab %} {% tab title="Results" %} ``` The username contains only letters and numbers. ``` {% endtab %} {% endtabs %}