Armstrong Number is a number whose sum of the power of digits is equal to the original number where power is number of digits in the number.
Example 1: 153. 13+53+33 = 1+125+27 = 153.
Example 2: 1634. 14+64+34+44 = 1+1296+81+256 = 1634.
Java
import java.util.*;
public class ArmstrongNumber
{
public static void main(String args[])
{
int n=0,r=0,s=0,temp=0,count=0;
Scanner sc=new Scanner(System.in);
System.out.print("Enter a number: ");
n=sc.nextInt();
temp=n;
while(temp>0)
{
count++;
temp=temp/10;
}
temp=n;
while(temp>0)
{
r=temp%10;
s=s+(int)Math.pow(r,count);
temp=temp/10;
}
if(s==n)
{
System.out.println(n+" is an Armstrong Number");
}
else
{
System.out.println(n+" is not an Armstrong Number");
}
}
}