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Swap two number using third variable program in PHP

Swap two number using third variable program in PHP

<?php

$a=10;
$b=20;

echo "Value of a: $a</br>";
echo "Value of b: $b</br>";

$temp=$a;
$a=$b; $b=$temp;

echo "Value of a: $a</br>";
echo "Value of b: $b</br>";

?>
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