Project Euler Problem 1 (PHP)

Author
Joseph
Created
Reading time
1 min
Views
235

Problem 1

If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23.

Find the sum of all the multiples of 3 or 5 below 1000.

Answer

[spoiler effect=”blind”]233168[/spoiler]

Script

Execution Time: 0.0004 seconds

$maxVal = 1000;
$startVal = 3;
$sum = 0;

for ($x=$startVal; $x<$maxVal; $x++) {
    if($x%3==0 || $x%5==0) {
        $sum += $x;
    }
}
echo $sum.PHP_EOL;