Neon Number Check in Java: Explanation & Practice

Check if a number is a Neon number

Problem summary

A Neon number equals the sum of digits of its square (e.g., 9² = 81, 8+1 = 9).

Starter code

public class Main {
    public static void main(String[] args) {
        int number = 9; // Test case 1
        
        // Check if Neon number
        // Print: Is Neon: <true/false>
    }
}

Expected output and test cases

9² = 81, 8+1=9
```
Is Neon: true
```
1² = 1, 1=1
```
Is Neon: true
```
5² = 25, 2+5=7≠5
```
Is Neon: false
```

Hints

Calculate the square
Sum all digits of the square
Compare sum with original number

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