**It** is a **number** that is equal to the sum of cubes of its digits. For example 153

1^3+5^3+3^3=1+125+27=153.

### For some basic concepts of java visit the link.

### https://java4school.com/conditional-constructs-in-java

#### Write a program to accept a number and check whether it is an Armstrong number or not.

```
import java.io.*;
public class ArmstrongNumber //number = the sum of the cubes of the digits e.g., 153
{
public static void main() throws IOException
{
BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
System.out.println("Enter a number");
int num=Integer.parseInt(br.readLine());
int n=num;
int sum=0;
while(num!=0)
{
int rem=num%10;
rem=(int)Math.pow(rem,3);
sum+=rem;
num=num/10;
}
if(sum==n)
{
System.out.println("Armstrong number");
}
else
{
System.out.println("Not an Armstrong number");
}
}
}
```

Output:

Enter a number

153

Armstrong number