How to Access Items in a Vector in C++ - Step by Step Examples

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How to Access Items in a Vector in C++ ?

Answer

To access items in a vector in C++, you can use indexing and iterators.

✐ Examples

1 Access Single Element by Index

In this example,

We include the header to use the vector container.
We create a vector named myVector containing some elements.
We access a single element from the vector using square brackets [] and specify the index of the element we want to access.
The element at the specified index is returned.
We print the accessed element to the console.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<std::string> myVector = {"apple", "banana", "cherry", "date"};

    // Access single element by index (e.g., index 1)
    std::string accessedElement = myVector[1];

    // Print accessed element
    std::cout << accessedElement << std::endl;
    return 0;
}

Output

banana

2 Access Multiple Elements by Index

In this example,

We include the header to use the vector container.
We create a vector named myVector containing some elements.
We use a range of indices inside square brackets [] to access multiple elements from the vector.
The elements within the specified range are returned as a new vector.
We print the accessed elements to the console.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<std::string> myVector = {"apple", "banana", "cherry", "date"};

    // Access multiple elements by indices (e.g., indices 0 to 2)
    std::vector<std::string> accessedElements(myVector.begin(), myVector.begin() + 3);

    // Print accessed elements
    for (const auto& element : accessedElements) {
        std::cout << element << "\n";
    }
    return 0;
}

Output

apple
banana
cherry

3 Access Elements Using Iterator

In this example,

We include the and headers to use the vector container and IO operations.
We create a vector named myVector containing numeric elements.
We use iterators with a loop to access and print elements from the vector.
The elements are accessed sequentially using iterators.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> myVector = {10, 20, 30, 40, 50};

    // Access elements using iterators
    for (auto it = myVector.begin(); it != myVector.end(); ++it) {
        std::cout << *it << "\n";
    }
    return 0;
}

Output

Summary

In this tutorial, we learned How to Access Items in a Vector in C++ language with well detailed examples.

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How to Access Items in a Vector in C++ - Step by Step Examples

How to Access Items in a Vector in C++ ?

Answer

✐ Examples

1 Access Single Element by Index

C++ Program

Output

2 Access Multiple Elements by Index

C++ Program

Output

3 Access Elements Using Iterator

C++ Program

Output

Summary

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