easyProgramming Fundamentals

If-Else Statements

Classify an integer as positive, negative, or zero.

GeeksforGeeks ↗

Work through the cases

3 examples

Input notation

One integer.

Expected result

positive, negative, or zero in lowercase.

Case 1

Input

-8

Expected output

negative

Case 2

Input

Expected output

zero

Case 3

Input

Expected output

positive

These notes use simplified input/output notation. The linked platform defines the method signature and judge format.

FROM IDEA TO IMPLEMENTATION

Understand the approach.

Compare the documented approaches below. Brute force, better, and optimal versions appear where available; a direct exercise may need only one approach.

Check the sign, treating zero separately. Time and extra space: O(1).

import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        ArrayList<Long> values = new ArrayList<>();
        while (in.hasNextLong()) values.add(in.nextLong());
        long[] a = values.stream().mapToLong(Long::longValue).toArray();
        long n = a[0];
        System.out.println(n > 0 ? "positive" : n < 0 ? "negative" : "zero");
    }
}

Reference code. Platform solutions may use supplied node types, imports, or collection libraries; foundational examples are complete programs.