C Vectors Tutorial | Vectors In C | C Vector Example | C Programming Tut

2. What’s in it for you? Why we use vectors in C++? What is vector in C++? Syntax Member function of vectors Modifiers Iterators Capacity

3. Why we use vectors in C++ ? Vectors are used in C++ because unlike arrays it’s size can be changed during runtime It has some extra inbuilt features like push_back() , size() , empty() etc

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5. What is vector in C++ ? It is not necessary to mention the size of vector while declaring it A vector is array like container, just like array it uses contiguous memory locations. But unlike array it’s size can change dynamically

6. Syntax vector<int>v1 vector<string>v2 vector<float>v3 Here, v1 ,v2, v3 are variable names

7. Member functions of vectors Modifiers 2. Iterators 3. Capacity

8. Modifiers It adds element at the end • push_back() • clear() It deletes the last element • erase() Inserts new elements before specified position Removes the elements from the container from the specified range It swaps the content between vectors • pop_back() • swap() It assigns new value to the vector It is used to remove all elements assign() insert()

9. Iterators begin() It returns the iterator to the beginning end() It returns the iterator to the end

10. Capacity size() It returns number of elements in the vector resize() empty() It changes the size It tests whether the vector is empty max_size() It returns maximum size of vector capacity() Returns size of allocated storage capacity