C++ Vector empty() function

C++ Vector empty() function tutorial for beginners and professionals with examples on assign(), at(), back(), begin(), capacity(), cbegin(), cend(), clear(), crbegin(), crend(), data(), emplace(), end(), front(), rbegin(), resize(), size(), swap() etc.

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C Vector empty()

This function determines whether the vector is empty or not.

Syntax

Consider a vector v. Syntax would be :

bool empty();

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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