How to get First Item in a Vector in C++

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How to get First Item in a Vector in C++ ?

Answer

To get the first item in a vector in C++, you can use the front method or directly access the element at index 0.

✐ Examples

1 Get First Item in Vector using front Method

In this example,

We create a vector named vec with some elements.
We use the front method of the vector vec to retrieve the first element.
The front method returns a reference to the first element.
Finally, we print the first element to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    int firstItem = vec.front();
    std::cout << "First item in the vector: " << firstItem << std::endl;
    return 0;
}

Output

First item in the vector: 1

2 Direct Access to First Element

In this example,

We create a vector named vec with some elements.
We access the element at index 0 of the vector vec directly using square brackets [].
The element at index 0 is the first element of the vector.
Finally, we print the first element to standard output.

C++ Program

#include <iostream>
#include <vector>

int main() {
    std::vector<int> vec = {1, 2, 3, 4, 5};
    int firstItem = vec[0];
    std::cout << "First item in the vector: " << firstItem << std::endl;
    return 0;
}

Output

First item in the vector: 1

Summary

In this tutorial, we learned How to get First Item in a Vector in C++ language with well detailed examples.

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How to get First Item in a Vector in C++

How to get First Item in a Vector in C++ ?

Answer

✐ Examples

1 Get First Item in Vector using front Method

C++ Program

Output

2 Direct Access to First Element

C++ Program

Output

Summary

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