valarray size() function in C++
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:-
// 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:-
// 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