In this example, you will learn to check whether an integer entered by the user is an Armstrong number or not using while loop and if...else statement. Understand the concept of Armstrong numbers in Data Structures and Algorithms (DSA). Explore step-by-step explanations, examples, and efficient code implementations to solve Armstrong number problems. The above method is the most straightforward method to check for Armstrong number in C, but we can also use other methods. Following are some commonly used methods to check for Armstrong number in C: Using Recursion We can convert the iterative method discussed above into recursive method by considering only a single digit of the number in each recursive call and calling the function again for the number with remaining digits. An Armstrong number (also known as a narcissistic number, pluperfect number, or pluperfect digital invariant) is a number that is equal to the sum of its own digits each raised to the power of the number of digits. For example, 153 is an Armstrong number because 13 + 53 + 33 = 153.
