for vector c++

To declare a vector in C++, follow these steps:

1. Include the necessary header file for vectors:

#include <vector>

1. Declare a vector of a specific data type:

std::vector<int> myVector;

1. Initialize the vector with a specific size and default value:

std::vector<int> myVector(5, 0);

1. Add elements to the vector using push_back:

myVector.push_back(10);

1. Access elements using the index operator:

int value = myVector[0];

1. Iterate through the vector using iterators:

for (auto it = myVector.begin(); it != myVector.end(); ++it) {
    // Access *it
}

1. Get the size of the vector using the size method:

int size = myVector.size();

1. Remove elements from the vector using pop_back:

myVector.pop_back();

1. Clear all elements from the vector:

myVector.clear();