How to Find the Size of a Vector in Bytes in C++? Last Updated : 22 Feb, 2024 Comments Improve Suggest changes Like Article Like Report In C++, Vectors are dynamic containers that can change their size during the insertion or deletion of elements. In this article, we will explore how we can find the size of the vector in bytes in C++. Example: Input:myVector = {10,20,30,40,50}Output:Size of the vector in bytes is : 20 bytesFind the Size of a Vector in Bytes in C++There is no direct method in C++ that can find the size of a vector in bytes. However, we can use the vector::size() method to find the number of elements in the vector and multiply it by the size of a single element which can be found using sizeof() operator. C++ Program to Find the Size of a Vector in Bytes C++ // C++ program to find the size of a vector in bytes #include <iostream> #include <vector> using namespace std; int main() { // Initialize a vector with few elements vector<int> vec = { 10, 20, 30, 40, 50 }; // Calculate the size of the vector int vecSize = vec.size(); // Calculate the size of any individual element in the // vector int elementSize = sizeof(vec[0]); // Calculate the size of the vector in bytes int size = vecSize * elementSize; cout << "Size of the vector in bytes is : " << size << endl; return 0; } OutputSize of the vector in bytes is : 20 Time Complexity: O(1)Auxiliary Space: O(1) Comment More infoAdvertise with us Next Article How to Find the Size of a Vector in Bytes in C++? G gaurav472 Follow Improve Article Tags : C++ Programs C++ STL cpp-vector CPP Examples +1 More Practice Tags : CPPSTL Similar Reads How to Find the Size of a Vector in C++? The size of a vector means the number of elements currently stored in the vector container. In this article, we will learn how to find the size of vector in C++.The easiest way to find the size of vector is by using vector size() function. Let’s take a look at a simple example:C++#include <bits/s 2 min read How to Find the Size of a Set in Bytes in C++? In C++, sets are associative containers that only store unique elements. The elements inside the set are sorted in a specific order. In this article, we will learn how we can find the size of a set in bytes in C++. Example Input: S = {1,2,3,4}Output: Size of the set in bytes is : 16Find the Size of 2 min read How to Find the Size of a Map in Bytes in C++? In C++, maps are associative containers that store a key value and a mapped value for each element and no two mapped values can have the same key values. In this article, we will explore how to find the size of the map in bytes in C++. Example Input: myMap = {{“appleâ€, 1}, {“bananaâ€, 2}, {“cherryâ€, 2 min read How to Find the Capacity of a Vector in Bytes in C++? In C++, vectors are used to store the collection of similar types of data and are able to automatically resize themself in order to accommodate more data. In this article, we will discuss how to calculate the capacity of a vector in bytes. For Example Input: myVector = {10, 34, 12, 90, 1}; Output: 2 2 min read How to Find the Median of Sorted Vector in C++? In C++, vectors are dynamic arrays and the median is a middle value when data is sorted in ascending order. In this article, we will learn how to find the median of all elements in a sorted vector in C++. Example Input: myVector = {10, 20, 30, 40, 50}; Output: Median is 30Finding Median of Sorted Ve 2 min read Like