# Swap Two Number Program In PHP

Swap two number generally is the process of interchange two variables with each other. Just suppose you have X whose value 10 there is another number Y with value of 20. Now if we swap these two number with each other then the X value will change to 20 and Y  value will change to 10.

So here I am gonna explain with a simple PHP program.

## Swap Two Number Program :-

```<?php

\$x=10;
\$y=20;

echo "Value of x: \$x</br>";
echo "Value of y: \$y</br>";

\$temp=\$x;
\$x=\$y;
\$y=\$temp;

echo "Value of x: \$x</br>";
echo "Value of y: \$y</br>";

?>```

## Output :-

```Value of x: 10
Value of y: 20
Value of x: 20
Value of y: 10```

You can also do this by without using third variable as below -

## Swap Two Number Without Using Third Variable Program :-

```<?php

\$x=10;
\$y=20;

echo "Value of x: \$x</br>";
echo "Value of y: \$y</br>";

\$x=\$x+\$y;
\$y=\$x-\$y;
\$x=\$x-\$y;

echo "Value of x: \$x</br>";
echo "Value of y: \$y</br>";

?>```

## Output :-

```Value of x: 10
Value of y: 20
Value of x: 20
Value of y: 10```