C++ Vector empty() function

by Online Tutorials Library July 22, 2022

C Vector empty()

This function determines whether the vector is empty or not.

Syntax

Consider a vector v. Syntax would be :

Parameter

It does not contain any parameter.

Return value

It returns a boolean value either 0 or 1.

Example 1

Let’s see a simple example.

  #include<iostream>  #include<vector>  using namespace std;  int main()  {  vector<int> v;  if(v.empty())  cout<<“Vector v is empty”;  else  cout<<“Vector v is not empty”;  return 0;  }  

Output:

Vector v is empty

Example 2

Let’s see a simple example.

  #include<iostream>  #include<vector>  using namespace std;  int main()  {  vector<char> v1{‘j’,’a’,’v’,’a’};  if(v1.empty())  cout<<“Vector v1 is empty”;  else  cout<<“Vector v1 is not empty”;  return 0;  }  

Output:

Vector v1 is not empty.

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