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Update Armstrong (#6131)

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Patient_Pace_Coder
2025-01-13 13:34:08 +05:30
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parent bd785dea4d
commit 779381f902
1 changed files with 6 additions and 3 deletions
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9
src/main/java/com/thealgorithms/maths/Armstrong.java
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@ -10,6 +10,7 @@ package com.thealgorithms.maths;
* An Armstrong number is often called a Narcissistic number.
*
* @author satyabarghav
* @modifier rahul katteda - (13/01/2025) - [updated the logic for getting total number of digits]
*/
public class Armstrong {
@ -20,14 +21,16 @@ public class Armstrong {
* @return {@code true} if the given number is an Armstrong number, {@code false} otherwise
*/
public boolean isArmstrong(int number) {
if (number < 0) {
return false; // Negative numbers cannot be Armstrong numbers
}
long sum = 0;
String temp = Integer.toString(number); // Convert the given number to a string
int power = temp.length(); // Extract the length of the number (number of digits)
int totalDigits = (int) Math.log10(number) + 1; // get the length of the number (number of digits)
long originalNumber = number;
while (originalNumber > 0) {
long digit = originalNumber % 10;
sum += (long) Math.pow(digit, power); // The digit raised to the power of the number of digits and added to the sum.
sum += (long) Math.pow(digit, totalDigits); // The digit raised to the power of total number of digits and added to the sum.
originalNumber /= 10;
}