length of array in cpp
#include <iostream>
int main() {
// Declare an array
int arr[] = {1, 2, 3, 4, 5};
// Calculate the length of the array
int length = sizeof(arr) / sizeof(arr[0]);
// Output the length of the array
std::cout << "Length of the array: " << length << std::endl;
return 0;
}