declare vector of size n in c 2b 2b

1// First include the vector library:
2#include <vector>
3
4// The syntax to create a vector looks like this:
5std::vector<type> name;
6
7// We can create & initialize "lol" vector with specific values:
8std::vector<double> lol = {66.666, -420.69};
9
10// it would look like this: 66.666 | -420.69

1#include <vector>
2
3auto n = 20
4// create a vector with n=20 integer elements
5std::vector<int> arr(n);