C++ Deque pop_front()

C++ Deque pop_front() function removes the first element from the deque and the size of the container is reduced by one.

Syntax

Parameter

It does not contain any parameter.

Return value

It does not return any value.

Example 1

Let's see a simple example

#include <iostream>
#include<deque>
using namespace std;
int main()
{
    deque<int> d={10,20,30,40,50};
    deque<int>::iterator itr;
    d.pop_front();
    for(itr=d.begin();itr!=d.end();++itr)
    cout<<*itr<<" ";
    return 0;
  }

Output:

20 30 40 50

In this example, pop_front() function removes the first element i.e 10 from the deque.

Example 2

Let's see a simple example

#include <iostream>
#include<deque>
using namespace std;
int main()
{
    deque<string> language={"C","C++","java",".net"};
    deque<string>::iterator itr;
    language.pop_front();
    for(itr=language.begin();itr!=language.end();++itr)
    cout<<*itr<<" ";
    return 0;
 }

Output:

C++ java .net

In this example, pop_front() function removes the first string i.e "C" from the deque.

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C++ Deque Function