PHP Program to find Average of N Numbers

Posted in PHP Tutorial

Updated on Jan 11, 2024

By Mari Selvan

👁️ 201 - Views

⏳ 4 mins

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PHP Program to find Average of N NumbersPHP

Photo Credit to CodeToFun

🙋 Introduction

In the world of programming, dealing with numerical data and performing calculations is a fundamental skill. One common task is finding the average of a set of numbers. This is a basic operation used in various applications, ranging from statistical analysis to data processing.

In this tutorial, we will explore a PHP program designed to find the average of N numbers. The program takes a user-specified number of inputs, calculates their sum, and then computes the average.

📄 Example

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

findAverage.php

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<?php

// Function to find the average of N numbers
function findAverage($n)
{
    $sum = 0;

    // Input N numbers from the user
    echo "Enter $n numbers:\n";

    for ($i = 0; $i < $n; ++$i) {
        // Input each number and add to the sum
        $number = (float) readline();
        $sum += $number;
    }

    // Calculate the average
    $average = $sum / $n;
    return $average;
}

// Driver program
// Replace this value with your desired number of inputs (N)
$n = 5;

// Call the function to find the average
$result = findAverage($n);

// Display the result
echo "The average of the entered numbers is: $result\n";

?>

💻 Testing the Program

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

Output

Enter 5 numbers:
1 2 3 4 5 
The average of the entered numbers is: 3.000000

🧠 How the Program Works

The program defines a function findAverage that takes an integer $n as input, prompts the user to input $n numbers, calculates their sum, and then computes and returns the average.
Replace the value of $n in the main program with your desired number of inputs.
The program calls the findAverage function, and the result is displayed.

🧐 Understanding the Concept to find Average of N Numbers

Before delving into the code, let's understand the concept behind finding the average of N numbers. The program uses a loop to input N numbers, calculates their sum, and then divides the sum by N to find the average.

For example, if the user enters 5 numbers (10, 15, 20, 25, 30), the program calculates (10 + 15 + 20 + 25 + 30) / 5, resulting in an average of 20.