How to create a Vector of Integers in C++

How to create a Vector of Integers in C++ ?

Answer

To create a vector of integers in C++, you can use the std::vector class and the push_back method to add integers to the vector.

✐ Examples

1 Create Vector of Integers using std::vector

In this example,

We include the header to use the std::vector class.
We create an empty vector named int_vector of type std::vector.
We use the push_back method to add integers one by one to the vector.
After adding all integers, the vector contains the desired sequence of integers.

C++ Program

#include <vector>
#include <iostream>

int main() {
    std::vector<int> int_vector;
    int_vector.push_back(1);
    int_vector.push_back(2);
    int_vector.push_back(3);
    int_vector.push_back(4);
    int_vector.push_back(5);

    for (int num : int_vector) {
        std::cout << num << " ";
    }
    std::cout << std::endl;
    return 0;
}

Output

1 2 3 4 5

2 Create Vector of Integers using Initializer List

In this example,

We use the curly braces {} with a list of integers inside to initialize a vector.
The vector is automatically created with the specified integers.
We assign the result to a variable named int_vector.

C++ Program

#include <vector>
#include <iostream>

int main() {
    std::vector<int> int_vector = {1, 2, 3, 4, 5};

    for (int num : int_vector) {
        std::cout << num << " ";
    }
    std::cout << std::endl;
    return 0;
}

Output

1 2 3 4 5

Summary

In this tutorial, we learned How to create a Vector of Integers in C++ language with well detailed examples.

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How to create a Vector of Integers in C++

How to create a Vector of Integers in C++ ?

Answer

✐ Examples

1 Create Vector of Integers using std::vector

C++ Program

Output

2 Create Vector of Integers using Initializer List

C++ Program

Output

Summary

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