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Conditional operator, positive & smaller

This C# exercise aims to develop a program that asks the user for two numbers and uses the conditional operator (?) to answer the following questions:


If the first number is positive.

If the second number is positive.

If both numbers are positive.

Which one is the smaller number.

The use of the conditional operator allows evaluating conditions compactly by comparing the two entered numbers. In this case, several expressions using this operator will be used to check the conditions and determine which number is smaller. This exercise is useful for learning how to work with the ternary operator in C# and understanding how it can simplify decision-making logic in a program. Additionally, it provides practice in number comparison and managing conditions in a single step.



Group

C# Flow Control Basics

Objective

Write a C# program that asks the user for two numbers and answers, using the conditional operator (?), for the following:

If the first number is positive
If the second number is positive
If both are positive
Which one is smaller

Example C# Exercise

 Copy C# Code 
using System;  // Import the System namespace which contains fundamental classes

class Program  // Define the Program class
{
    static void Main()  // The entry point of the program
    {
        // Ask the user to enter the first number
        Console.Write("Enter the first number: ");
        int num1 = int.Parse(Console.ReadLine());  // Read and convert the input into an integer

        // Ask the user to enter the second number
        Console.Write("Enter the second number: ");
        int num2 = int.Parse(Console.ReadLine());  // Read and convert the input into an integer

        // Use the conditional operator to check if the first number is positive
        string result1 = (num1 > 0) ? "The first number is positive." : "The first number is not positive.";  
        Console.WriteLine(result1);  // Display the result for the first number

        // Use the conditional operator to check if the second number is positive
        string result2 = (num2 > 0) ? "The second number is positive." : "The second number is not positive.";  
        Console.WriteLine(result2);  // Display the result for the second number

        // Use the conditional operator to check if both numbers are positive
        string result3 = (num1 > 0 && num2 > 0) ? "Both numbers are positive." : "At least one number is not positive.";  
        Console.WriteLine(result3);  // Display the result if both numbers are positive

        // Use the conditional operator to check which number is smaller
        string smaller = (num1 < num2) ? "The first number is smaller." : (num2 < num1) ? "The second number is smaller." : "Both numbers are equal.";  
        Console.WriteLine(smaller);  // Display the result for the smaller number
    }
}

 Output

Case 1:
Enter the first number: 5
Enter the second number: 3
The first number is positive.
The second number is positive.
Both numbers are positive.
The second number is smaller.

Case 2:
Enter the first number: -5
Enter the second number: 3
The first number is not positive.
The second number is positive.
At least one number is not positive.
The first number is smaller.

Case 3:
Enter the first number: 0
Enter the second number: 0
The first number is not positive.
The second number is not positive.
At least one number is not positive.
Both numbers are equal.

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