Java Program To Find Armstrong Number or Not

Armstrong Number is number that is equal to sum of cubes of its digits

For Example:      0,1,153,370,371


Let us try to understand why 153 is Armstrong Number:

          
153= (1*1*1)+(5*5*5)+(3*3*3)

    
where:  

(1*1*1)=1

5*5*5)=125

(3*3*3)=27

TOTAL IS: 153

Let us try to understand why 370 is Armstrong Number:

370 =(3*3*3)+(7*7*7)+(0*0*0)

Where:

(3*3*3)=27

(7*7*7)=343

(0*0*0)=0

Total is:  370

Now Let us  see to check Armstrong Number:

Ex:                         

class ArmstrongNumber{

public static void main(String args[]){

int sum=0,a,temp;

int n=153;// it is number to check armstrong number

temp=n;

while(n>0){

a=n%10;

n=n/10;
sum=sum+(a*a*a);

}

if(temp==sum){
System.out.println("Armstrong number");

else{

System.out.println("not Armstrong number");

}

}

Output:        

Armstrong number