JavaScript Program to find Average of N Numbers

Posted in JavaScript Tutorial

Updated on Oct 30, 2024

By Mari Selvan

👁️ 315 - Views

⏳ 4 mins

💬 1 Comment

JavaScript Program to find Average of N Numbers

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 JavaScript 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 JavaScript code that accomplishes this task.

findAverage.html

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<!DOCTYPE html>
<html>
<body>

<script>
// Function to find the average of N numbers
function findAverage(n) {
  let sum = 0;

  // Input N numbers from the user
  console.log(`Enter ${n} numbers:`);

  for (let i = 0; i < n; ++i) {
    // Input each number and add to the sum
    let number = parseFloat(prompt());
    sum += number;
  }

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

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

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

// Display the result
console.log(`The average of the entered numbers is: ${result}`);  
</script>

</body>
</html>

💻 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.