size()

C++ Vector pop_back() It deletes the last element and reduces the size of the vector by one. Syntax Consider a vector v.Syntax…

Java Collection remove() Method The remove() method of Java Collection Interface is used to remove a single instance of the specified element…

Java Collection removeAll() Method The removeAll() method of Java Collection Interface only removes those elements of the Collection that are contained in…

Java Collection retainAll() method The retainAll() method of Java Collection Interface keeps only those elements in this queue that are present in…

Java HashSet clone() Method The clone() method of Java HashSet class is used to return a shallow copy of the specified HashSet.…

Java HashSet isEmpty() Method The isEmpty() method of Java HashSet class is used to check wheather HashSet contains an element or not.…

C++ Vector size() It determines the number of elements in the vector. Syntax Consider a vector ‘v’ and number of elements ‘n’.…

Java HashSet add() Method The add() is a method of Java HashSet class which adds the specified element to this set if…

Java HashSet clear() Method The clear() method of Java HashSet class is used to removes all of the elements from this set.…

Java HashSet contains() Method The contains() method of Java HashSet class is used to check if this HashSet contains the specified element…