Bug #78187 [Opn->Nab]: Exponentiation operator gives incorrect result
| From: | nikic@php.net | Date: | Thu, 20 Jun 2019 08:45:02 +0000 |
| Subject: | Bug #78187 [Opn->Nab]: Exponentiation operator gives incorrect result | ||
| References: | 1 | Groups: | php.bugs |
| Request: | Send a blank email to php-bugs+get-221410@lists.php.net to get a copy of this message | ||
Edit report at https://bugs.php.net/bug.php?id=78187&edit=1
ID: 78187
Updated by: nikic@php.net
Reported by: francis dot crossen at gmail dot com
Summary: Exponentiation operator gives incorrect result
-Status: Open
+Status: Not a bug
Type: Bug
Package: *Math Functions
Operating System: n/a
PHP Version: 7.3.6
Block user comment: N
Private report: N
New Comment:
-1 ** 2 is -(1**2).
I would recommend to avoid spaces around ** to indicate that this is a high-precedence operator.
Previous Comments:
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[2019-06-20 08:40:45] francis dot crossen at gmail dot com
Description:
------------
Tested in PHP shell on Linux and Windows
Test script:
---------------
<?php
// expect 1
echo -1 * -1 . PHP_EOL;
echo pow(-1, 2) . PHP_EOL;
echo -1 ** 2 . PHP_EOL;
// expect 49
echo -7 * -7 . PHP_EOL;
echo pow(-7, 2) . PHP_EOL;
echo -7 ** 2 . PHP_EOL;
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Edit this bug report at https://bugs.php.net/bug.php?id=78187&edit=1