Swap Two number Program in PHP

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Swap Two number Program in PHP

Swap two number with each other means interchange their value. Suppose you have two number a and b a contain 10 and b contain value 20 after swap their value, a have 20 and b have 10.

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>";

?>

Output

	
Value of a: 10
Value of b: 20
Value of a: 20
Value of b: 10

Swap two number without using third variable program in PHP

<?php

$a=10;
$b=20;

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

$a=$a+$b;
$b=$a-$b;
$a=$a-$b;

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

?>

Output

	
Value of a: 10
Value of b: 20
Value of a: 20
Value of b: 10

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