how to calculate the length of a vector code example
Example 1: vector length c++
#include <vector>
int main () {
std::vector<int> v;
auto size = v.size();
}Example 2: vector length formula
||v|| = sqrt(a^2+b^2)#include <vector>
int main () {
std::vector<int> v;
auto size = v.size();
}||v|| = sqrt(a^2+b^2)