The Ds\Sequence::sum() function is an inbuilt function in PHP which is used to return the sum of all values of the sequence.
Syntax:
number abstract public Ds\Sequence::sum( void )
Parameters: This function does not accept any parameters.
Return value: This function returns the sum of all sequence elements in form of integer or float.
Below programs illustrate the Ds\Sequence::sum() function in PHP:
Program 1:
<?php    // Create new sequence $seq = new \Ds\Vector([5, 7, 8, 14, 23]);   // Use sum() function to find // the sum of sequence element var_dump($seq->sum());   ?> |
Output:
int(57)
Program 2:
<?php    // Create new sequence $seq = new \Ds\Vector([5, 7.5, 8.4, 14, 23]);   // Use sum() function to find // the sum of sequence element var_dump($seq->sum());   ?> |
Output:
float(57.9)
Reference: http://php.net/manual/en/ds-sequence.sum.php
