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Narcissistic numbers, also known as Armstrong numbers, are a fascinating concept in mathematics and programming. A narcissistic number is a number that is equal to the sum of its digits, each raised to the power of the total number of digits. In this article, we’ll explore how to write a Java program to output all the narcissistic numbers within a given range using functions. This guide will help you understand the logic behind narcissistic numbers and how to implement them efficiently in Java.