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  1. <?php
  2.  
  3. function fibonacci($n) {
  4. 	$a = 0;
  5. 	$b = 1;
  6. 	$c = 1;
  7. 	for ($i = 1; $i < $n ; $i++) { 
  8. 		$c = $a + $b;
  9. 		$a = $b;
  10. 		$b = $c;
  11.     }
  12.     return $c;
  13. }
  14. echo fibonacci(1) ."\n";
  15. echo fibonacci(3) ."\n";
  16. echo fibonacci(100) ."\n";
  17.  
  18. 	// Tem um bug aqui, se usar fibonacci(0) vai dar 1.
  19. 	// Como é só pra ilustrar, não vou complicar o código
  20. 	// mas 1 "if" resolveria, se fosse o caso. 
  21.  
Success #stdin #stdout 0.02s 52432KB
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3.5422484817926E+20
https://ideone.com/w5Tap2
language:
PHP (php 7.3.5)
created:
9 years ago
visibility:
public

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