Description:
Check if the given number is Armstrong number or not?
Armstrong numbers are the sum of their own digits to the power of the number of digits.
Code:
package com.techonol.algos;
public class ArmstrongNumber {
public boolean isArmstrongNumber(int number) {
int tmp = number;
int noOfDigits = String.valueOf(number).length();
int sum = 0;
int div = 0;
while (tmp > 0) {
div = tmp % 10;
int temp = 1;
for (int i = 0; i < noOfDigits; i++) {
temp *= div;
}
sum += temp;
tmp = tmp / 10;
}
if (number == sum) {
return true;
} else {
return false;
}
}
public static void main(String a[]) {
ArmstrongNumber an = new ArmstrongNumber();
System.out.println("Is 153 an Armstrong number? " + an.isArmstrongNumber(153));
System.out.println("Is 579 an Armstrong number? " + an.isArmstrongNumber(523));
System.out.println("Is 371 an Armstrong number? " + an.isArmstrongNumber(371));
}
}
Output:
Is 153 an Armstrong number? true Is 579 an Armstrong number? false Is 371 an Armstrong number? true