PHP implementation of monkey picking peach algorithm code sharing

A monkey picked a bunch of peaches, immediately ate half, but the peach is too delicious, it ate one more, the next day it took the first day of the rest of the peach ate half, and ate one more, so to the tenth morning it only left a peach, asked how many peaches it picked out altogether? This article teaches you how to use PHP code to derive the answer.

Method 1

function Taozi ($i) {if ($i ==10) {   return 1;  } $i = (Taozi ($i + 1) +1) * *; return $i;} echo "Altogether peach has", taozi (1); Echo '  
Method 2
 

 
$a =1;for ($i =10; $i >1; $i-) {$a = ($a + 1) * *;} Echo ' altogether picked ', $a, ' a peach '; Echo '