This method is also same as mkString() method but here it is accompanied by a start, a separator and an end.
Method Definition: def mkString(start: String, sep: String, end: String): String
Where, start is the starting string, sep is the separator string and end is the ending string.
Return Type: It returns the string representation of the stated collection along with a start, a separator and an end.
Where, start is the *, sep is the 0 and end is also *.