Armstrong Number

Easy
15
75.0% Acceptance

In this lab, you'll be implementing a method in Java that determines whether a given number is an Armstrong number. This is a great opportunity to apply your Java skills and understand an interesting numerical concept.

What is an Armstrong Number?

An Armstrong number, also known as a narcissistic number, 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, in a 3-digit number ( abc ), the number is an Armstrong number if ( a^3 + b^3 + c^3 = abc ). Similarly, for a 4-digit number ( abcd ), it would be an Armstrong number if ( a^4 + b^4 + c^4 + d^4 = abcd ).

Task

Your task is to implement a method named isArmstrongNumber in Java. This method will take an integer as input and return a boolean value:

  • It returns true if the input number is an Armstrong number.
  • It returns false otherwise.

Implementation Suggestions

  • Think about how to break down the number into its individual digits.
  • Consider how to compute the power of a number with respect to the number of digits.
  • Remember to compare the sum of the powered digits to the original number to determine if it's an Armstrong number.

Note

Focus on creating a method that is efficient and handles various test cases, especially edge cases like very small or very large numbers. Good luck!

Challenges Information

Challenge 1: Verify 370

  • Description: Implement the isArmstrongNumber method to check if 370 is an Armstrong number.
  • Expected Result: The method should return true.

Challenge 2: Verify 371

  • Description: Implement the isArmstrongNumber method to check if 371 is an Armstrong number.
  • Expected Result: The method should return true.

Challenge 3: Verify 0

  • Description: Implement the isArmstrongNumber method to check if 0 is an Armstrong number.
  • Expected Result: The method should return true.

Challenge 4: Verify 1

  • Description: Implement the isArmstrongNumber method to check if 1 is an Armstrong number.
  • Expected Result: The method should return true.

Challenge 5: Verify 1634

  • Description: Implement the isArmstrongNumber method to check if 1634 is an Armstrong number.
  • Expected Result: The method should return true.

Challenge 6: Verify 2

  • Description: Implement the isArmstrongNumber method to check if 2 is not an Armstrong number.
  • Expected Result: The method should return false.

Challenge 7: Verify 123

  • Description: Implement the isArmstrongNumber method to check if 123 is not an Armstrong number.
  • Expected Result: The method should return false.