[Solved] I need help at a simple while loop

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It would be better if you use a for instead of a while, but if it’s an exercise requirement than you can write:

$int = 8;
$i = 1;
$sum = 0;
while ($i <= $int) {
    $sum += $i;
    $i++;
}

A more advanced notation would be: $sum += $i++; (so you can remove the final $i++).
And a better algorithm would be: $sum = ($int * ($int + 1)) / 2;, this wouldn’t require any loop.

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solved I need help at a simple while loop