Q:

Subtracting Two Numbers in Php

robaa
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2022-11-13
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There are three methods to subtract two numbers:

  • Subtraction in simple code in PHP
  • Subtraction in form in PHP
  • Subtraction without using arithmetic operator (+).
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robaa
2022-11-13
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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;  
?>

Output:

 

Subtraction in Form

By inserting values in the form two numbers can be subtracted.

Example:

<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>

Output:

 

Subtraction in Form without (-) Operator

By inserting values in the form two numbers can be subtracted but without using (-) operator.

Example:

<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;  
?>

Output:

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