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Check if Both Numbers Are Negative in C#

This exercise helps you practice the use of conditionals in C# to determine whether two input numbers are negative or not. The program asks the user to input two numbers and checks if both of them are negative. The result will be displayed based on the condition: if both numbers are negative, a message will be shown; otherwise, another message will inform the user that both numbers are not negative.

Understanding conditional statements such as if and logical operators (&&) is key to writing programs that make decisions based on the user's input.



Group

C# Flow Control Basics

Objective

The objective of this exercise is to write a C# program to prompt the user for two numbers and determine if both numbers are negative or not.

Example C# Exercise

 Copy C# Code 
// First and Last Name: John Doe

using System;

namespace CheckNegativeNumbers
{
    class Program
    {
        // Main method to execute the program
        static void Main(string[] args)
        {
            // Declare variables to store the two numbers
            int number1, number2;

            // Prompt the user to enter the first number
            Console.Write("Enter the first number: ");
            number1 = int.Parse(Console.ReadLine()); // Read and parse the user's input

            // Prompt the user to enter the second number
            Console.Write("Enter the second number: ");
            number2 = int.Parse(Console.ReadLine()); // Read and parse the user's input

            // Check if both numbers are negative
            if (number1 < 0 && number2 < 0)
            {
                // If both numbers are negative, display this message
                Console.WriteLine("Both numbers are negative.");
            }
            else
            {
                // If at least one number is not negative, display this message
                Console.WriteLine("Both numbers are not negative.");
            }
        }
    }
}

 Output

//Case 1:
Enter the first number: -5
Enter the second number: -8
Both numbers are negative.

//Case 2:
Enter the first number: -5
Enter the second number: 3
Both numbers are not negative.

//Case 3:
Enter the first number: 5
Enter the second number: 3
Both numbers are not negative.

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