PHP Program to Condense a Number

Posted in PHP Tutorial

Updated on Jan 11, 2024

By Mari Selvan

👁️ 38 - Views

⏳ 4 mins

💬 1 Comment

Photo Credit to CodeToFun

🙋 Introduction

In the realm of programming, various tasks involve manipulating and transforming numbers. One interesting problem is condensing a number, which means reducing a number by summing its digits until a single-digit number is obtained. This process is often referred to as finding the digital root or digit sum.

In this tutorial, we will explore a PHP program designed to condense a given number. The program involves repeatedly summing the digits of the number until a single-digit result is achieved.

📄 Example

Let's delve into the PHP code that accomplishes this task.

condenseNumber.php

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<?php

// Function to condense a number
function condenseNumber($number) {
    // Continue summing digits until a single-digit number is obtained
    while ($number > 9) {
        $sum = 0;

        // Sum the digits of the number
        while ($number > 0) {
            $sum += $number % 10;
            $number = (int)($number / 10);
        }

        // Update the number with the sum
        $number = $sum;
    }

    // Return the condensed number
    return $number;
}

// Driver program
// Replace this value with the number you want to condense
$number = 9875;

// Call the function to condense the number
$condensedNumber = condenseNumber($number);

// Display the result
echo "The condensed form of $number is: $condensedNumber\n";

?>

💻 Testing the Program

To test the program with different numbers, modify the value of $number in the code.

Output

The condensed form of 9875 is: 2

🧠 How the Program Works

The program defines a function condenseNumber that takes an integer $number as input and condenses it by summing its digits until a single-digit result is obtained.
Replace the value of $number in the main program with the desired number you want to condense.
The program calls the condenseNumber function and prints the result using echo.

🧐 Understanding the Concept of Condensing a Number

Before delving into the code, let's understand the concept behind condensing a number. The process involves repeatedly summing the digits of the number until a single-digit result is achieved.

For example, consider the number 9875. The program would calculate 9 + 8 + 7 + 5 = 29, then 2 + 9 = 11, and finally 1 + 1 = 2. The condensed form is 2.