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Positive, Negative or Zero

beginner Number Problems

Read one integer and print Positive if it is greater than 0, Negative if it is less than 0, and Zero if it is 0.

Constraints

-10^9 <= n <= 10^9

Examples

Input

Output

Positive

Input

-2

Output

Negative

if / else if / else

Solutions

Best approachTime O(1)Space O(1)

Three cases cover all integers. We must handle 0 separately, because it is not positive and not negative.

Same code works in Java810172125Basic features only, so nothing changes between versions.

/*
 * Problem : Classify a number by its sign.
 * Input   : One integer.
 * Output  : Positive, Negative or Zero.
 * Approach: Compare the number with 0.
 * Time    : O(1)
 * Space   : O(1)
 * Java    : 8 or newer.
 */
import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        int number = new Scanner(System.in).nextInt();

        // Step 1: If the number is greater than 0, it is positive.
        if (number > 0) {
            System.out.println("Positive");
        // Step 2: If the number is less than 0, it is negative.
        } else if (number < 0) {
            System.out.println("Negative");
        // Step 3: In all other cases the number is 0. Zero is neither positive nor negative.
        } else {
            System.out.println("Zero");
        }
    }
}

Hints (2)

How many different answers are possible?
Do not forget zero.