Question

How to implement a cumulative sum of numbers in array in PHP

Answer 1

function accumulate($arr) { 
    $sum = 0;
    for ($i = 0; $i < sizeof($arr); $i++) {
        $sum += $i;
        echo $sum . " ";
    }
    echo "<br />";
} 


// 0 : 0+1=1 : 0+1+2=3 : 0+1+2+3=6 : 0+1+2+3+4=10 : 0+1+2+3+4+5=15 ...
$arr = array(0, 1, 2, 3, 4, 5, 6);
  
accumulate($arr);
  
  
  
/*
run:
       
0 1 3 6 10 15 21 
      
*/

 

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