Java: Check the number is negative, zero, or positive

Last update on March 11 2025 11:03:36 (UTC/GMT +8 hours)

Check Negative, Zero, or Positive Integer

Write a Java program that reads an integer and check whether it is negative, zero, or positive.

Test Data
Input a number: 7

Pictorial Presentation:

Sample Solution:

Java Code:

import java.util.Scanner;
public class Exercise27 {
 public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        System.out.print("Input a number: ");
        int n = in.nextInt();

        if (n > 0)
        {
            System.out.println("Number is positive");
        }
        else if (n < 0)
        {
            System.out.println("Number is negative");
        }
        else
        {
            System.out.println("Number is zero");
        }
    }
}

Sample Output:

Input a number: 7                                                                                             
Number is positive

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Java program to check whether an integer is negative, zero, or positive using only arithmetic operations.
• Write a Java program to evaluate a list of integers and count how many are negative, zero, or positive.
• Write a Java program to determine the sign of an integer using Math.signum() and print a custom message.
• Write a Java program to classify an integer as negative, zero, or positive without using conditional statements.

Java Code Editor:

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Next: Write a Java program that reads a floating-point number. If the number is zero it prints "zero", otherwise, print "positive" or "negative". Add "small" if the absolute value of the number is less than 1, or "large" if it exceeds 1,000,000.