starts-with
Returns Boolean true if the string supplied as argument starts with the sub-string supplied as argument; false otherwise.

Languages
Built-in, C++, C#, Java, XQuery, XSLT 1.0, XSLT 2.0, XSLT 3.0.
Parameters
| Name | Description | 
|---|---|
| string | The input string. | 
| substr | The sub-string to check for. | 
Example
If the input string is category and substr is cat, the function returns true.