PHP Adding Two Numbers – PHP program

In this tutorial, we will discuss the PHP Adding Two Numbers – PHP program

In this topic, we are going to learn how to write a program to add two numbers in PHP programming language

Sum of two numbers

Sum of two numbers using variables

Program 1

Addition of two numbers 25 and 50 and the output is displayed here

<?php
$n1=25;
$n2=50;
$sum=$n1+$n2;
    echo "Sum: ",$sum;
?>

When the above code is executed, it produces the following result

Sum: 75

Sum of two numbers by passing input to form

Program 2

In this program, the user is asked to enter two numbers(by passing input value to form). Then two numbers are added using the + operator and the result is displayed on the screen

<html>
<head>
  <title>Addition of two numbers </title>
  </head>
//create html from
<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="Sum">  
</form> 
//End HTML form 

// php script
<?php  
    if(isset($_POST['submit']))  
    {  
        $number1 = $_POST['number1'];  
        $number2 = $_POST['number2'];  
        $sum =  $number1+$number2;  
//calculate  sum of two numbers using + operator
echo "The sum of $number1 and $number2 is: ".$sum;   
//display sum of two numbers
}  
?>  
//Exit
</body>
</html>

When the above code is executed, it produces the following result

Sum of two numbers by passing input to form without + operator

Program 3

In this program, the user is asked to enter two numbers(by passing input value to form). Then two numbers are added without using + operator and the result is displayed on the screen

<html>
  <body>
<form>  //Start html form
Enter 1st number for sum:  
<input type="number" name="number1" /><br><br>  
Enter 2nd number for sum:  
<input type="number" name="number2" /><br><br>    
<input  type="submit" name="submit" value="Sum">  
</form>  //End form
</body>
<?php  //PHP script
  @$number1 = $_GET['number1'];  
  @$number2 = $_GET['number2'];  
  for($i=1; $i<=$number2; $i++) 
  {//calculate sum of two numbers using for loop
  $number1++;
        }			
echo "Sum of given two numbers".$number1
//display sum of two numbers
;  
//Exit   
?>  

</html>

When the above code is executed, it produces the following result