C++ Deque cbegin()

C++ Deque cbegin() function returns a constant iterator pointing to the first element of the deque container. This iterator can be incremented or decremented just like the iterator returned by the begin() function. If the container is empty then the returned iterator will be equal to the cend().

Syntax

Parameter

It does not contain any parameter.

Return value

It returns a constant iterator pointing to the beginning of the container.

Example 1

Let's see a simple example

#include <iostream>
#include<deque>
using namespace std;
int main()
{
 deque<string> fruit={"mango","apple","banana","kiwi"};
 deque<string>::const_iterator itr;
 itr=fruit.cbegin();
  cout<<*itr;
  return 0;
}

Output:

mango

In this example, cbegin() function returns a constant iterator to the beginning of the container.

Example 2

Let's see a simple example

#include <iostream>
#include<deque>
using namespace std;
int main()
{
 deque<int> k={100,200,300,400,500};
 deque<int>::const_iterator itr;
 itr=k.cbegin()+3;
  cout<<*itr;
  return 0;
}

Output:

In this example, cbegin() function is incremented by 3. Therefore, it returns an iterator of the 4th element.

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