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PHP PHP Arrays and Control Structures PHP Loops Ping Pong

yahya alhalki
yahya alhalki
1,149 Points
Posted by yahya alhalki
yahya alhalki
1,149 Points

why do we have to put parentheses round ($player1 < 11 && $player2 < 11) )?

//My Code

<?php


$player1 = 1;
$player2 = 2;
$round = 0;
$difference = abs($player1 - $player2) < 2;

while($difference|| ($player1 < 11 && $player2 < 11) ){

  $round++;
    echo "<h2>round $round<h2/>\n";

  if(rand(0,1)){
    $player1++;

  } else{
    $player2++; 
  }
 echo "player 1 = $player1<br />\n";
echo "player 2 = $player2<br />\n";
}


?>


//why do we have to put parentheses round  ($player1 < 11 && $player2 < 11) )
Michael Cook
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Michael Cook
Full Stack JavaScript Techdegree Graduate 28,960 Points

You need to explain your question to get an answer. The title of your question is vague.

2 Answers

Piotr Manczak
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.a{fill-rule:evenodd;}techdegree seal-36
Piotr Manczak
Front End Web Development Techdegree Graduate 24,787 Points
Piotr Manczak
.a{fill-rule:evenodd;}techdegree seal-36
Piotr Manczak
Front End Web Development Techdegree Graduate 24,787 Points

We want to keep it as a separate condition. We want to evaluate it separately.

yahya alhalki
yahya alhalki
1,149 Points
yahya alhalki
yahya alhalki
1,149 Points

what is the use of that. i tried to remove the parenthesis and they both execute the same way

Damir Paulić
Damir Paulić
6,591 Points
Damir Paulić
Damir Paulić
6,591 Points

Well, because of the operator precedence, parentheses in this case is not needed. "&&" is executed before "||". https://www.php.net/manual/en/language.operators.precedence.php

Personally, I would still use parentheses because it could get overwhelming to think about precedence while still figuring the logical part.