valarray size() function in C++ Last Updated : 23 Oct, 2018 Comments Improve Suggest changes Like Article Like Report The size() function is defined in valarray header file. This function is used to find the size of valarray and returns the size of valarray. Syntax: size_t size() const; Parameter: This function doesn't takes any parameter. Returns: This function returns the number of element in valarray. Below programs illustrate the above function: Example 1:- CPP // C++ program to demonstrate // example of size() function. #include <bits/stdc++.h> using namespace std; int main() { // Initializing valarray valarray<int> varr = { 20, 40, 60, 80 }; // Displaying size of valarray cout << "The size of valarray is: "; cout << varr.size(); cout << endl; return 0; } Output: The size of valarray is: 4 Example 2:- CPP // C++ program to demonstrate // example of size() function. #include <bits/stdc++.h> using namespace std; int main() { // Initializing valarray valarray<int> varr = { -20, 40, -50, 60, 80, 0, 0 }; // Displaying size of valarray cout << "The size of valarray is: "; cout << varr.size(); cout << endl; return 0; } Output: The size of valarray is: 7 Comment More infoAdvertise with us Next Article valarray size() function in C++ bansal_rtk_ Follow Improve Article Tags : Misc C++ Programs C++ CPP-Functions cpp-valarray +1 More Practice Tags : CPPMisc Similar Reads valarray resize() function in C++ The resize() function is defined in valarray header file. This function resizes the valarray to contain n elements and assigns value to each element.Syntax: void resize( size_t n, T value = T() ); Parameter: This method accepts two parameters: n: It represents the new size of valarray.value: It repr 2 min read max() function for valarray in C++ The max() function is defined in valarray header file. This function returns the largest value contained in the valarray. Syntax: T max() const; Parameter: This function doesn't accept any parameter. Returns: This function returns the maximum value in the valarray. Below programs illustrate the abov 1 min read cshift() function for valarray in C++ The cshift() function is defined in valarray header file. This function returns a new valarray of the same size with elements whose positions are shifted circularly by n elements. If n is negative, right-shift is applied, if n is positive left-shift is applied. Syntax: valarray cshift (int n) const; 2 min read valarray min() in C++ The min() function is defined in valarray header file. This function returns the smallest value contained in the valarray. Syntax: T min() const; Returns: This function returns the minimum value in the valarray. Below programs illustrate the above function: Example 1:- CPP // C++ program to demonstr 1 min read valarray shift() in C++ The shift() function is defined in valarray header file. This function returns a new valarray of the same size with elements whose positions are shifted by n elements. If n is negative, right-shift is applied, if n is positive left-shift is applied. Syntax: valarray shift (int n) const; Parameter: T 2 min read valarray sum() in C++ The sum() function is defined in valarray header file. This function returns the sum of all the elements in the valarray, as if calculated by applying operator+= to a copy of one element and all the other elements, in an unspecified order. Syntax: T sum() const; Returns: This function returns the su 1 min read How to Pass an Array into a Lambda Function in C++? In C++, a lambda function, also known as a lambda expression, is a way of defining an anonymous function object right at the location where it is invoked or passed as an argument to a function. In this article, we will learn how to pass an array into a lambda function in C++. Passing an Array into a 2 min read 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 Find Column and Row Size of a 2D Vector in C++ In C++, 2D vector is the vector in which each element is a vector in itself. The number of these vectors represent the column size, and the size of each vector represents the row size. In this article we will learn how to find the row size and column size of 2D vectors in C++.The simplest way to fin 3 min read How to Find the Size of a Vector in Bytes in C++? 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 2 min read Like