PHP | stats_stat_factorial() Function

PHP stats_stat_factorial() Function


Hello folks! welcome back to a new edition of our tutorial on PHP. In this tutorial guide, we are going to be studying about the PHP stats_stat_factorial() function.

The built-in stats_stat_factorial() function in PHP returns the factorial of an integer.

Syntax

Following below is the syntax to use this function -

float stats_stat_factorial( int $n )


Parameter Details

Sr.NoParameterDescription
1

n

An integer


Return Value

This PHP function returns the factorial of an integer, n.

Dependencies

This built-in function was first introduced in statistics extension (PHP version 4.0.0 and PEAR v1.4.0). In this tutorial guide, we used the latest release of stats-2.0.3 (PHP v7.0.0 or newer and PEAR version 1.4.0 or newer).

Example1

In the below example, we have compute the factorial of an integer 0 -

<?php
   var_dump(stats_stat_factorial(0));
?>

Output

When the above code is executed, it will produce the following result -

float(1)

Example2

In the below example, we have compute the factorial of an integer 1 -

<?php
   var_dump(stats_stat_factorial(1));
?>

Output

When the above code is executed, it will produce the following result -

float(1)

Example3

In the below example, we have compute the factorial of an integer 2 -

<?php
   var_dump(stats_stat_factorial(2));
?>

Output

When the above code is executed, it will produce the following result -

float(2)

Example4

In the below example, we have compute the factorial of an integer 3 -

<?php
   var_dump(stats_stat_factorial(3));
?>

Output

When the above code is executed, it will produce the following result -

float(6)

Example5

The following is an error case. In the below example, we passed an empty parameter. A warning is shown in logs -

<?php
   // error cases
   var_dump(stats_stat_factorial());
?>

Output

The above code will produce the following result and a warning in logs PHP Warning: stats_stat_factorial(): expects exactly 1 parameter, 0 given

bool(false)


Alright guys! This is where we are going to be rounding up for this tutorial post. In our next tutorial, we will be studying about the PHP stats_stat_independent_t() Function.

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