Number Classification in Java: Explanation & Practice

Problem summary

Classify a number: print whether it's positive/negative/zero, even/odd, and if it's a perfect square.

Starter code

public class Main {
    public static void main(String[] args) {
        int n = 16; // Test case 1
        
        // Print classification on separate lines
        // Positive/Negative/Zero
        // Even/Odd
        // Perfect Square: Yes/No
    }
}

Expected output and test cases

• 16 is positive, even, perfect square

  Positive
  Even
  Perfect Square: Yes

• -7 classification

  Negative
  Odd
  Perfect Square: No

• 0 is even and 0² = 0

  Zero
  Even
  Perfect Square: Yes

Hints

1. Use nested if-else for sign
2. n % 2 for even/odd
3. Check if sqrt(n)² equals n for perfect square

Related Control Flow exercises

• Practice Neon Number Check in Java
• Practice Advanced Leap Year in Java
• Practice Number Pattern Spiral in Java

Practice all Control Flow exercises · Run this idea in the Java compiler