Euler #1 y #2

Hay que mantenerse en forma...

https://projecteuler.net/problem=1

Python:

   1 #!/usr/bin/env python3
   2 
   3 sum = 0
   4 for n in range(1, 1000):
   5     if n % 3 == 0 or n % 5 == 0:
   6         sum += n
   7 
   8 print (sum)
   9 

JavaScript:

   1 var sum = 0;
   2 for (var i=1; i<1000; i++) {
   3   if (i % 3 == 0 || i % 5 == 0) {
   4     sum += i;
   5   }
   6 }
   7 console.log(sum)
   8 

---

https://projecteuler.net/problem=2

PHP (iterativo):

   1 <?php
   2 
   3 function fib($max) {
   4   $ret = array(1, 2);
   5   $x = 3;
   6   while (true) {
   7     $new = $ret[$x-2] + $ret[$x-3];
   8     if ($new <= $max) {
   9       $ret []= $new;
  10       $x++;
  11     } else {
  12       break;
  13     }
  14   }
  15   return $ret;
  16 }
  17 
  18 
  19 $sum = 0;
  20 foreach (fib(4000000) as $n) {
  21   if ($n % 2 == 0) {
  22     $sum += $n;
  23   }
  24 }
  25 
  26 echo "$sum\n";
  27