vector front() in C++

front(): It is a build-in function in STL. It returns a read/write reference to 

the data at the first element of the vector.

Parameter: No parameter is required for this function.

Syntax:

vecName.front()

For Example:

vec = {1,2,3,4}

vec.front() = > It returns the first element (i.e 1)

Approach

C++

#include <bits/stdc++.h>
using namespace std;

int main()
{
    vector<int> vec = {1, 2, 3, 4};

    //print the first element of the vector
    cout << vec.front() << "\n";

    return 0;
}