C++ Create Vector with Specific Size

In this C++ tutorial, you will learn how to create a vector of specific size during vector declaration, with example programs.

Create Vector with Specific Size in C++

To create a vector with specific initial size, specify the size in the vector declaration.

Syntax

The syntax to create a vector of specific initial size size and datetype type is

vector<type> vectorname(size);

Examples

1. Create integer vector of size=5

In the following program, we create an integer vector of size 5.

main.cpp

#include <iostream>
#include <vector>
using namespace std;

int main() {
    vector<int> nums(5);
    cout << "Vector size : " << nums.size() << endl;
}

Output

Vector size : 5

2. Create string vector of size=10

In the following program, we create a string vector of size 10.

main.cpp

#include <iostream>
#include <vector>
using namespace std;

int main() {
    vector<string> names(10);
    cout << "Vector size : " << names.size() << endl;
}

Output

Vector size : 10

Conclusion

In this C++ Tutorial, we have learnt how to create a vector of specific initial size in C++.