PHP implementation of monkey picking peach algorithm code sharing

A monkey picked a bunch of peaches and ate half of them immediately, but the peaches were so delicious that he ate one more. The next day, he ate half of the remaining peaches from the first day and ate more. It picked one peach, and by the morning of the tenth day it had only one peach left. Ask it how many peaches it had picked in total? This article teaches you how to use php code to get the answer.

Method 1

function taozi($i){
 if($i==10)
 {
   return 1;
  }

 $i=(taozi($i+1)+1)*2;
 return $i;
}
echo "一共桃子有",taozi(1);
echo '
';

Method 2

##

$a=1;
for($i=10;$i>1;$i--){
$a=($a+1)*2;
}

echo '一共摘了',$a,'个桃子';
echo '
';

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