Write a Java Program to get a number from the user and print whether it is Positive or Negative

In this article, we will understand how to check whether a number is positive or negative. This is accomplished by checking if the given number is greater or less then 0.

Below is a demonstration of the same −

Input

Suppose our input is −

Enter the number: -3

Output

The desired output would be −

The number -30 is a negative number

Algorithm

Step 1 - START
Step 2 - Declare an integer values namely my_input.
Step 3 - Read the required values from the user/ define the values
Step 4 - Using an if-else condition, check my_input > 0 value.
Step 5 - If the result is true, then it’s a positive number, else it’s a negative number.
Step 6 - Display the result
Step 7 - Stop

Example 1

Here, the input is being entered by the user based on a prompt. You can try this example live in our coding ground tool

import java.util.Scanner;
public class PositiveNegative {
   public static void main(String[] args) {
      int my_input;
      System.out.println("Required packages have been imported");
      Scanner my_scanner = new Scanner(System.in);
      System.out.println("A reader object has been defined ");
      System.out.print("Enter the number : ");
      my_input = my_scanner.nextInt();
      if(my_input > 0)
          System.out.println("The number " +my_input + " is a positive number");
      else
         System.out.println("The number " +my_input + " is a negative number");
   }
}

Output

Required packages have been imported
A reader object has been defined
Enter the number : -30
The number -30 is a negative number

Example 2

Here, the integer has been previously defined, and its value is accessed and displayed on the console.

public class PositiveNegative {
   public static void main(String[] args) {
      int my_input;
      my_input = -30;
      System.out.println("The number is defined as " +my_input);
      if(my_input > 0)
         System.out.println("The number " +my_input + " is a positive number");
      else
         System.out.println("The number " +my_input + " is a negative number");
   }
}

Output

The number is defined as -30
The number -30 is a negative number

Updated on 22-Feb-2022 10:52:36

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Read a number from the user using the Scanner class's method. check whether the given number is greater, lesser or, equal to 0. If it is greater given number is positive if the lesser given number is negative. the else given number is neither positive or negative.

Example

import java.util.Scanner;

public class PositiveOrNegative {
   public static void main(String args[]){
      int num;
      System.out.println("Enter a number ::");
      Scanner sc = new Scanner(System.in);
      num = sc.nextInt();

      if (num > 0){
         System.out.println("Given number is a positive integer");
      } else if(num < 0){
         System.out.println("Given number is a negative integer");
      } else {
         System.out.println("Given number is neither positive nor negative integer");
      }
   }
}

Output 1

Enter a number ::
55
Given number is a positive integer

Output 2

Enter a number ::
-88
Given number is a negative integer

Updated on 13-Mar-2020 07:03:14

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