// Program to determine whether the number is Armstrong number or not public class Armstrong { // Function to calculate x raised to the power y int power(int x, long y) { if( y == 0) return 1; if (y%2 == 0) return power(x, y/2)*power(x, y/2); return x*power(x, y/2)*power(x, y/2); } // Function to calculate order of the number int order(int x) { int n = 0; while (x != 0) { n++; x = x/10; } return n; } boolean isArmstrong (int x) { // Calling order function int n = order(x); int temp=x, sum=0; while (temp!=0) { int r = temp%10; sum = sum + power(r,n); temp = temp/10; } return (sum == x); } public static void main(String[] args) { Armstrong ob = new Armstrong(); int x = 153; System.out.println(ob.isArmstrong(x)); x = 1253; System.out.println(ob.isArmstrong(x)); } }