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