Calculate sum in while loop to array

Question

When the number 6 is giving I need to calculate till 6: for example: 1+2+3+4+5+6=21. I also need to add the sums of each to an array like: 1+2=3, 1+2+3=6, 1+2+3+4=10, ...

I have tried to make the while loop to be printed and this working fine but nog for array purpose:

   <?php
  $number = $_POST['number'];
  $i = 1;
  $cal = 0;
  $tussenBerekening = array();

  while ($i <= $number) {
    echo $i;
    $cal = $cal + $i;
    array_push($tussenBerekening, $cal);
    if ($i != $number) {
      echo " + ";
    } else {
      echo " = " . $cal;
    }
    $i++;
  }
?>

This is my new code, it prints, but no total sum.

<?php
  $number = $_POST['number'];
  $i = 2;
  $cal = 0;
  $sum = 1;
  $berekeningen = array();


  while ($i <= $number) {
    $sum .= "+" . $i;
    array_push($berekeningen, $sum);
    $i++;
  }

  print_r($berekeningen);

 ?>

u_mulder · Accepted Answer · 2019-10-01 21:04:48Z

1

Here's a solution:

$i = 1;
$number = 6;
while ($i <= $number) {
    // generate array with values from 1 to $i
    $array = range(1, $i);
    // if there're more than 1 element in array - output sum
    if (count($array) > 1) {
             // 1+2+... part                // sum of elements of array
        echo implode('+', $array) . ' = ' . array_sum($array) . '<br />';
    }
    $i++;
}

answered Oct 1, 2019 at 21:04

u_mulder

54.8k5 gold badges54 silver badges72 bronze badges

Sign up to request clarification or add additional context in comments.

1 Comment

Joundill Over a year ago

Nice! That's a really pretty PHP-specific solution. The asker's going to look like a professional old-timer on his assignment :)

Collectives™ on Stack Overflow

Calculate sum in while loop to array

1 Answer 1

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related