There's a problem with your use of the backslash ( \ ) character. In a regular expression, the backslash character is used ...

There's a problem with your use of the backslash ( \ ) character. In a regular expression, the backslash character is used for text pattern matching. For example, "\d" matches any digit from 0 to 9. The backslash character can also be used as an escape character for a special character. For example, "\" searches for the text character "\".