Write a Java Program to check Armstrong number.

1.	Write a Java Program to check Armstrong number.
Answer» LET's try to UNDERSTAND why 153 is an Armstrong number. 153 = (111)+(555)+(333) where: (111)=1 (555)=125 (333)=27 So: 1+125+27=153 Let's try to understand why 371 is an Armstrong number. 371 = (333)+(777)+(111) where: (333)=27 (777)=343 (111)=1 So: 27+343+1=371 Let's see the java program to check Armstrong Number. class ArmstrongExample{ public static void main(String[] ARGS) { int c=0,a,temp; int n=153;//It is the number to check armstrong temp=n; while(n>0) { a=n%10; n=n/10; c=c+(aaa); } if(temp==c) System.out.println("armstrong number"); else System.out.println("Not armstrong number"); } } Output: armstrong number

Answer»

LET's try to UNDERSTAND why 153 is an 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

So:

1+125+27=153

Let's try to understand why 371 is an Armstrong number.

371 = (3*3*3)+(7*7*7)+(1*1*1)

where:

(3*3*3)=27

(7*7*7)=343

(1*1*1)=1

So:

27+343+1=371

Let's see the java program to check Armstrong Number.

class ArmstrongExample{

public static void main(String[] ARGS) {

int c=0,a,temp;

int n=153;//It is the number to check armstrong

temp=n;

while(n>0)

{

a=n%10;

n=n/10;

c=c+(a*a*a);

}

if(temp==c)

System.out.println("armstrong number");

else

System.out.println("Not armstrong number");

}

Output:

armstrong number

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