Discover How to Display Armstrong Numbers from 1 to 100 Using JavaScript

Hey there, aspiring coder! If you’ve just started your coding journey and are diving into the world of JavaScript, you might be wondering what a cool project could look like. How about we dig into something intriguing called Armstrong numbers? In this blog, we’ll explore and understand how to display Armstrong numbers between 1 to 100 in JavaScript. Don’t worry if you’re not familiar with what an Armstrong number is— we’ll simplify it for you. So grab your favorite chai, and let’s take a step deeper into the fun and fascinating realm of programming!

Displaying Armstrong Numbers from 1 to 100 Using JavaScript Code

function isArmstrongNumber(num) {
    let sum = 0;
    let temp = num;
    while (temp > 0) {
        let digit = temp % 10;
        sum += digit  3;
        temp = Math.floor(temp / 10);
    }
    return sum === num;
}

for (let i = 1; i <= 100; i++) {
    if (isArmstrongNumber(i)) {
        console.log(i);
    }
}
  

Explanation of the Code

Let’s break down how this JavaScript code works to display Armstrong numbers between 1 to 100:
That’s it! It’s a simple yet fascinating way to identify Armstrong numbers.

• First, a function isArmstrongNumber checks if a number is an Armstrong number. It initializes variables sum and temp to store the sum of the cubes of the digits and a temporary copy of the number, respectively.
• The while loop calculates each digit of the number. It uses % to extract the last digit and Math.floor to remove the last digit from temp. The cube of each digit is added to sum.
• After the loop, sum is compared to the original number. If they’re equal, the number is indeed an Armstrong number!
• The for loop then iterates over numbers from 1 to 100. It calls isArmstrongNumber for each number and logs it to the console if it’s an Armstrong number.

Output

1
153
370
371
407

Real-Life Uses of Displaying Armstrong Numbers in JavaScript

Here is a list of practical use cases for the topic “Display Armstrong Numbers Between 1 to 100 in JavaScript”:

1. Educational Purposes: One primary use case is in educational settings. Explaining and demonstrating how to code Armstrong numbers is an excellent way to introduce beginners to concepts like loops, conditionals, and number manipulation in JavaScript. It’s both a fun and challenging exercise that increases problem-solving skills.


2. Algorithm Practice: Displaying Armstrong numbers can be used as a hands-on approach for practicing algorithms. It helps in understanding how numbers can be broken down, transformed, and verified by employing logical algorithms. This kind of exercise sharpens algorithmic thinking, which is crucial for more advanced coding tasks.


3. Interview Preparation: It’s a popular coding problem in technical interviews. Candidates are often asked to write code that finds Armstrong numbers, demonstrating their ability to implement logic and understand mathematical computation. Practicing such problems helps in improving coding proficiency before interviews.


4. Game Development: You might wonder how Armstrong numbers link to game development? Well, such logical computations can be handy for setting up easter eggs or hidden challenges in games. Implementing logic to check specific numeric conditions like Armstrong numbers adds depth and fun to the gaming experience.


5. Mathematical Exploration: Armstrong numbers provide an insight into number theory and its unique properties. Coders interested in mathematics often play with these numbers to explore and discover new patterns, giving them a deeper understanding of the beauty and intricacies of numbers.

Each of these use cases highlights how versatile the concept of Armstrong numbers can be, making it relevant beyond just a simple coding exercise.

Interview Questions on Armstrong Numbers in JavaScript: Key Insights

Five common interview questions and answers about displaying Armstrong numbers between 1 to 100 in JavaScript:

1. What is an Armstrong Number?
   An Armstrong number for a given number of digits is a number that is equal to the sum of its digits each raised to the power of the number of digits.
   How do you identify Armstrong Numbers using JavaScript?
   By iterating over a range of numbers, splitting each number into its digits, raising each digit to the power of the number of digits, and checking if the sum equals the original number.
   What loop structure is commonly used to find Armstrong numbers?
   A simple ‘for’ loop is used for iterating through numbers in the specified range.
   


2. How many Armstrong numbers exist between 1 and 100?
   There are four: 1, 153, 370, and 371.
   
3. Why are Armstrong Numbers also called Narcissistic Numbers?
   Because they are numbers that equal the sum of their digits each raised to the power of the number of digits.
   

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Conclusion

In conclusion, displaying Armstrong Numbers between 1 to 100 in JavaScript offers a fantastic way to grasp essential coding concepts. Explore more such engaging programming tutorials on Newtum. Keep experimenting with code, and don’t hesitate to share your journey with fellow learners!

Edited and Compiled by

This blog was compiled and edited by Rasika Deshpande, who has over 4 years of experience in content creation. She’s passionate about helping beginners understand technical topics in a more interactive way.

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