priority_queue value_type in C++ STL

The priority_queue :: value_type method is a built-in function in C++ STL which represents the type of object stored as an element in a priority_queue. It acts as a synonym for the template parameter. 

Time complexity: O(1)
Syntax:

priority_queue::value_type variable_name

It has no parameters and no return value. 
Below programs illustrate the above function.
Program 1:

CPP

// C++ program to illustrate the
// priority_queue :: value_type function
#include <bits/stdc++.h>
using namespace std;

// Driver code
int main()
{
    // declare value_type for priority queue
    priority_queue<int>::value_type AnInt;

    // Declares priority_queue
    priority_queue<int> q1;

    // here AnInt acts as a variable of int data type
    AnInt = 20;
    cout << "The value_type is AnInt = " << AnInt << endl;

    q1.push(AnInt);
    AnInt = 30;
    q1.push(AnInt);

    cout << "The element at the top of the priority_queue is "
         << q1.top() << "." << endl;

    return 0;
}

Output

The value_type is AnInt = 20
The element at the top of the priority_queue is 30.

Program 2:

CPP

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

// Driver code
int main()
{
    // declare value_type for priority queue
    priority_queue<string>::value_type AString;

    // Declares priority_queue
    priority_queue<string> q2;

    // here AString acts as a variable of string data type
    AString = "geeks for geeks";
    cout << "The value_type is AString = " << AString << endl;

    AString = "abc";
    q2.push(AString);
    AString = "def";
    q2.push(AString);
    AString = "ghi";
    q2.push(AString);

    cout << "Value stored in priority queue are :" << endl;
    while (!q2.empty()) {
        cout << '\t' << q2.top();
        q2.pop();
    }

    return 0;
}

// This code is modified by Susobhan Akhuli

Output

The value_type is AString = geeks for geeks
Value stored in priority queue are :
    ghi    def    abc