Check if a Number is Positive or Negative in Java

In Java, you can easily check whether a given number is positive, negative, or zero by using simple if-else statements.

Here is an example:

Example: Check if a Number is Positive, Negative, or Zero

import java.util.Scanner;public class PositiveNegativeZero {    public static void main(String[] args) {        Scanner scanner = new Scanner(System.in);                // Asking for user input        System.out.print("Enter a number: ");        int number = scanner.nextInt();                // Checking if the number is positive, negative, or zero        if (number > 0) {            System.out.println(number + " is positive.");        } else if (number < 0) {            System.out.println(number + " is negative.");        } else {            System.out.println(number + " is zero.");        }                scanner.close();    }}

Explanation:

• if (number > 0): This checks if the number is positive.

• else if (number < 0): This checks if the number is negative.

• else: This block is executed if the number is neither positive nor negative, which means it must be zero.

Sample Output:

1. When the input is positive:

   Enter a number: 55 is positive.

2. When the input is negative:

   Enter a number: -3-3 is negative.

3. When the input is zero:

   Enter a number: 00 is zero.

Shorter Version (Using Ternary Operator)

You can also use a ternary operator for a more concise version:

import java.util.Scanner;public class PositiveNegativeZero {    public static void main(String[] args) {        Scanner scanner = new Scanner(System.in);                // Asking for user input        System.out.print("Enter a number: ");        int number = scanner.nextInt();                // Using ternary operator        String result = (number > 0) ? "positive" : (number < 0) ? "negative" : "zero";                System.out.println(number + " is " + result);                scanner.close();    }}

This uses the ternary operator to directly assign the result based on the conditions.

Conclusion

This is a simple and effective way to check if a number is positive, negative, or zero in Java. You can also modify this logic to handle floating-point numbers (like float or double) instead of integers, with the same approach.

Let me know if you'd like any further clarification or additional examples!