C#: Check whether a number is positive or negative

Last update on December 20 2024 12:48:31 (UTC/GMT +8 hours)

Write a C# Sharp program to check whether a given number is positive or negative.

Sample Solution:-

C# Sharp Code:

using System;  // Importing the System namespace

public class Exercise3  // Declaration of the Exercise3 class
{  
    public static void Main()  // Entry point of the program
    {
        int num;  // Declaration of the integer variable num
        Console.Write("\n\n");  // Printing new lines
        Console.Write("Check whether a number is positive or negative:\n");  // Displaying the purpose of the program
        Console.Write("----------------------------------------------");  // Displaying a separator
        Console.Write("\n\n");  // Printing new lines
        Console.Write("Input an integer : ");  // Prompting user to input an integer
        num = Convert.ToInt32(Console.ReadLine());  // Reading the input integer from the user

        if (num >= 0)  // Checking if num is greater than or equal to zero
            Console.WriteLine("{0} is a positive number.\n", num);  // Printing a message if the number is positive
        else
            Console.WriteLine("{0} is a negative number. \n", num);  // Printing a message if the number is negative
    }
}

Sample Output:

Check whether a number is positive or negative:                                                               
----------------------------------------------
Input an integer : -10                                                                                        
-10 is a negative number.

Pictorial Presentation:

Flowchart:

C# Sharp Code Editor:

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