C++ Deque emplace_front()

C++ Deque emplace_front() function adds a new element to the beginning of the deque container and the size of the container is increased by one.

Syntax

Parameter

val: New value is to be inserted at the beginning of the deque.

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<string> fruit={"mango","banana"};
  deque<string>::iterator itr;
  fruit.emplace_front("apple");
  fruit.emplace_front("strawberry");
  for(itr=fruit.begin();itr!=fruit.end();++itr)
  std::cout << *itr<<" ";
   return 0;
}

Output:

strawberry apple mango banana

In this example, emplace_front() function add two strings i.e apple and strawberry at the beginning of the deque.

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C++ Deque Function