STARTSWITH

From LongJump Support Wiki

The STARTSWITH function determines whether a target string starts with (begins with) a search string. This function returns TRUE if the target string starts with the search string. If the target string does not start with (begin with ) the search string, this function returns FALSE.

Syntax
STARTSSWITH('string', 'searchString')
Return
TRUE or FALSE
Examples
STARTSWITH('admin@stop.com', 'admin') = TRUE
STARTSWITH('john@stop.com, 'admin') = FALSE