Objective-C supports the following compound assignment operators:
Operator Description
x += y Add x to y and place result in x
x -= y Subtract y from x and place result in x
x *= y Multiply x by y and place result in x
x /= y Divide x by y and place result in x
x %= y Perform Modulo on x and y and place result in x
x &= y Assign to x the result of logical AND operation on x and y
x |= y Assign to x the result of logical OR operation on x and y
x ^= y Assign to x the result of logical Exclusive OR on x and y
<table border="1" cellspacing="0">
<tr style="background:#efefef;">
<th>Operator</th><th>Description</th>
<tr>
<td>x += y<td>Add x to y and place result in x</td>
<tr>
<td>x -= y<td>Subtract y from x and place result in x</td>
<tr>
<td>x *= y<td>Multiply x by y and place result in x</td>
<tr>
<td>x /= y<td>Divide x by y and place result in x</td>
<tr>
<td>x %= y<td>Perform Modulo on x and y and place result in x</td>
<tr>
<td>x &= y<td>Assign to x the result of logical AND operation on x and y</td>
<tr>
<td>x |= y<td>Assign to x the result of logical OR operation on x and y</td>
<tr>
<td>x ^= y<td>Assign to x the result of logical Exclusive OR on x and y</td>
</table>
Another useful shortcut can be achieved using the Objective-C increment and decrement operators (also referred to as unary operators because they operate on a single operand). As with the compound assignment operators described in the previous section, consider the following Objective-C code fragment:
Clearly 10 is less than 20, resulting in a true evaluation of the x < y expression. The following table lists the full set of Objective-C comparison operators:
Exception encountered, of type "Error"
[afe46d44] /index.php/Special:MobileDiff/9142 Error from line 434 of /var/www/techotopia/includes/diff/DairikiDiff.php: Call to undefined function each()
Backtrace:
#0 /var/www/techotopia/includes/diff/DairikiDiff.php(544): DiffEngine->diag()
#1 /var/www/techotopia/includes/diff/DairikiDiff.php(344): DiffEngine->compareSeq()
#2 /var/www/techotopia/includes/diff/DairikiDiff.php(227): DiffEngine->diffLocal()
#3 /var/www/techotopia/includes/diff/DairikiDiff.php(721): DiffEngine->diff()
#4 /var/www/techotopia/includes/diff/DairikiDiff.php(859): Diff->__construct()
#5 /var/www/techotopia/includes/diff/DairikiDiff.php(980): MappedDiff->__construct()
#6 /var/www/techotopia/extensions/MobileFrontend/includes/diff/InlineDiffFormatter.php(99): WordLevelDiff->__construct()
#7 /var/www/techotopia/includes/diff/DiffFormatter.php(140): InlineDiffFormatter->changed()
#8 /var/www/techotopia/includes/diff/DiffFormatter.php(82): DiffFormatter->block()
#9 /var/www/techotopia/extensions/MobileFrontend/includes/diff/InlineDifferenceEngine.php(117): DiffFormatter->format()
#10 /var/www/techotopia/includes/diff/DifferenceEngine.php(797): InlineDifferenceEngine->generateTextDiffBody()
#11 /var/www/techotopia/includes/diff/DifferenceEngine.php(728): DifferenceEngine->generateContentDiffBody()
#12 /var/www/techotopia/extensions/MobileFrontend/includes/specials/SpecialMobileDiff.php(241): DifferenceEngine->getDiffBody()
#13 /var/www/techotopia/extensions/MobileFrontend/includes/specials/SpecialMobileDiff.php(135): SpecialMobileDiff->showDiff()
#14 /var/www/techotopia/extensions/MobileFrontend/includes/specials/MobileSpecialPage.php(53): SpecialMobileDiff->executeWhenAvailable()
#15 /var/www/techotopia/includes/specialpage/SpecialPage.php(384): MobileSpecialPage->execute()
#16 /var/www/techotopia/includes/specialpage/SpecialPageFactory.php(553): SpecialPage->run()
#17 /var/www/techotopia/includes/MediaWiki.php(281): SpecialPageFactory::executePath()
#18 /var/www/techotopia/includes/MediaWiki.php(714): MediaWiki->performRequest()
#19 /var/www/techotopia/includes/MediaWiki.php(508): MediaWiki->main()
#20 /var/www/techotopia/index.php(41): MediaWiki->run()
#21 {main}