Scala Bitsets are sets of non-negative integers which are represented as variable-size arrays of bits packed into 64-bit words. The ++:[B](that: TraversableOnce[B]) method is utilised create a collection containing the elements from the left hand operand followed by the elements from the right hand operand.
Method Definition: def ++:[B](that: TraversableOnce[B])
Return Type: It returns a new bitset which contains all elements of this bitset followed by all elements of that.
LinkedList(0, 1, 2, 3, 100)
LinkedList(0, 1, 2, 3, A, B)