Armstrong Number
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
.