PHP | Ds\Deque count() Function

Last Updated : 14 Aug, 2019
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The Ds\Deque::count() function is an inbuilt function in PHP which is used to get the number of elements in the Deque. Syntax: 
public Ds\Deque::count( void ) : int
Parameters: This function does not accept any parameter. Return Value: This function returns the number of elements in the Deque. Below programs illustrate the Ds\Deque::count() function in PHP: Program 1: PHP 
<?php

// Declare a deque
$deck = new \Ds\Deque([1, 2, 3, 4, 5, 6]);

echo("Elements in the Deque\n");

// Display the Deque elements
print_r($deck);

echo("\nNumber of elements in the Deque: ");

print_r($deck->count());

?>
Output: 
Elements in the Deque
Ds\Deque Object
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

Number of elements in the Deque: 6
Program 2: PHP 
<?php

// Declare a deque
$deck = new \Ds\Deque(["geeks", "for", "geeks"]);

echo("Elements in the Deque\n");

// Display the Deque elements
print_r($deck);

echo("\nNumber of elements in the Deque: ");

print_r($deck->count());

?>
Output: 
Elements in the Deque
Ds\Deque Object
(
    [0] => geeks
    [1] => for
    [2] => geeks
)

Number of elements in the Deque: 3
Reference: http://php.net/manual/en/ds-deque.count.php

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