Area of a Triangle in C#

Problem Statement

We need to create a C# program that calculates the area of a triangle. The formula to calculate the area of a triangle given its base and height is:
Area=1/2​×Base×Height

The program will prompt the user to enter the base and height of the triangle, then compute and display the area.

Logic and Approach

1. Understanding the Formula: The area of a triangle can be calculated using the formula involving the base and height. This is a straightforward multiplication followed by division.
2. User Input: The program should accept input for the base and height from the user.
3. Calculation: Using the formula ( \text{Area} = \frac{1}{2} \times \text{Base} \times \text{Height} ), the program calculates the area.
4. Output: The result is then displayed to the user.

C# Program: Area of a Triangle

using System;

namespace TriangleAreaCalculator
{
    class Program
    {
        static void Main(string[] args)
        {
            // Introduction message
            Console.WriteLine("Welcome to the Triangle Area Calculator!");

            // Getting the base input from the user
            Console.Write("Enter the base of the triangle (in units): ");
            double baseOfTriangle = Convert.ToDouble(Console.ReadLine());

            // Getting the height input from the user
            Console.Write("Enter the height of the triangle (in units): ");
            double heightOfTriangle = Convert.ToDouble(Console.ReadLine());

            // Calculating the area
            double area = CalculateArea(baseOfTriangle, heightOfTriangle);

            // Displaying the result
            Console.WriteLine($"The area of the triangle is {area} square units.");
        }

        // Method to calculate the area of the triangle based on base and height
        static double CalculateArea(double baseOfTriangle, double heightOfTriangle)
        {
            return 0.5 * baseOfTriangle * heightOfTriangle;
        }
    }
}

Code Explanation

1. Namespace and Class Declaration

namespace TriangleAreaCalculator
{
    class Program
    {

• namespace TriangleAreaCalculator: The namespace groups related classes together and helps in avoiding name conflicts. Here, it encapsulates the TriangleAreaCalculator program.
• class Program: This is the main class of our application, containing the program logic.

2. Main Method

static void Main(string[] args)
{
    // Introduction message
    Console.WriteLine("Welcome to the Triangle Area Calculator!");

• static void Main(string[] args): The entry point of the application. static means the method belongs to the class itself, and void indicates that it does not return any value.
• Console.WriteLine("Welcome to the Triangle Area Calculator!");: Displays a welcome message to the user.

3. User Input for Base

Console.Write("Enter the base of the triangle (in units): ");
double baseOfTriangle = Convert.ToDouble(Console.ReadLine());

• Console.Write("Enter the base of the triangle (in units): ");: Prompts the user to input the base of the triangle.
• double baseOfTriangle = Convert.ToDouble(Console.ReadLine());: Reads the user’s input as a string, converts it to a double type, and assigns it to the baseOfTriangle variable.

4. User Input for Height

Console.Write("Enter the height of the triangle (in units): ");
double heightOfTriangle = Convert.ToDouble(Console.ReadLine());

• Similar to the base input, this code prompts the user for the height and converts the input to a double type.

5. Area Calculation

double area = CalculateArea(baseOfTriangle, heightOfTriangle);

• double area = CalculateArea(baseOfTriangle, heightOfTriangle);: Calls the CalculateArea method, passing the base and height as arguments, and assigns the returned value (area) to the area variable.

6. CalculateArea Method

static double CalculateArea(double baseOfTriangle, double heightOfTriangle)
{
    return 0.5 * baseOfTriangle * heightOfTriangle;
}

• static double CalculateArea(double baseOfTriangle, double heightOfTriangle): This static method calculates the area of the triangle based on the given base and height. It takes two double arguments and returns a double.
• return 0.5 * baseOfTriangle * heightOfTriangle;: This line calculates the area by multiplying 0.5 with the base and height and returns the result.

7. Display the Result

Console.WriteLine($"The area of the triangle is {area} square units.");

• Console.WriteLine(...): This line displays the calculated area to the user.

Conclusion

This C# program provides a simple way to calculate the area of a triangle using the base and height provided by the user. The program demonstrates basic concepts like reading user input, type conversion, and method creation in C#.