Subtracting Two Numbers
Subtracting Two Numbers
There are three methods to subtract two numbers:
- Subtraction in simple code in PHP
- Subtraction in form in PHP
- Subtraction without using arithmetic operator (+).
Subtraction in Simple Code
Subtraction of two numbers 30 and 15 is shown.
Example:
<?php
$x=30;
$y=15;
$z=$x-$y;
echo "Difference: ",$z;
?> 
<html>
<body>
<form method="post">
Enter First Number:
<input type="number" name="number1" /><br><br>
Enter Second Number:
<input type="number" name="number2" /><br><br>
<input type="submit" name="submit" value="Subtract">
</form>
<?php
if(isset($_POST['submit']))
{
$number1 = $_POST['number1'];
$number2 = $_POST['number2'];
$sum = $number1-$number2;
echo "The difference of $number1 and $number2 is: ".$sum;
}
?>
</body>
</html> 
<body>
<form>
Enter First Number:
<input type="number" name="number1" /><br><br>
Enter Second Number:
<input type="number" name="number2" /><br><br>
<input type="submit" name="submit" value="Subtract">
</form>
</body>
<?php
@$number1=$_GET['number1'];
@$number2=$_GET['number2'];
for ($i=1; $i<=$number2; $i++)
{
$number1--;
}
echo "Difference=".$number1;
?> 