check for empty vector

[MareoRaft]

What is the easiest way to check if a vector is empty?

#include <iostream>
#include <vector>

using namespace std;

typedef std::vector<double> Vec;
typedef std::vector<Vec> Mat;

int main(){
    Vec v; // this is what i consider to be an "empty" v
    if( /*check if v is empty here*/ ) cout<< "v is empty!" <<endl;
return 0;
}

[Narue]

if(v.empty()) cout<< "v is empty!" <<endl;

:icon_rolleyes:

[MareoRaft]

if(v.empty()) cout<< "v is empty!" <<endl;

:icon_rolleyes:

Gracias!

[tiredoy]

Well,just using the method

v.empty()

If the vector is empty,it will return a bool value .

[NathanOliver]

@tiredoy empty() always returns a bool. It will always return true if the vector is empty.