C# Program to add two numbers

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace T4Tutorials.com
{
    class Program
    {
        static void Main(string[] args)
        {
            int x = 9;
            int y = 11;
            int sum = x + y;
            Console.WriteLine(sum); // Print the sum of x + y
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace T4Tutorials.com

{

class Program

{

static void Main(string[] args)

{

int x = 9;

int y = 11;

int sum = x + y;

Console.WriteLine(sum); // Print the sum of x + y

}

Output 20

Adding Two Numbers Entered By User in C# Console Application

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace T4Tutorials.com
{
    class Program
    {
        static void Main(string[] args)
        {
            int Value1, Value2;
            Console.WriteLine("please enter the Value1");
            Value1 = Convert.ToInt32(Console.ReadLine());
            Console.WriteLine("please enter the Value2");
            Value2 = Convert.ToInt32(Console.ReadLine());
            int Result;
            Result = Value1 + Value2;
            Console.WriteLine("Sum of two Values:" + Result.ToString());
            Console.ReadLine();
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace T4Tutorials.com

{

class Program

{

static void Main(string[] args)

{

int Value1, Value2;

Console.WriteLine("please enter the Value1");

Value1 = Convert.ToInt32(Console.ReadLine());

Console.WriteLine("please enter the Value2");

Value2 = Convert.ToInt32(Console.ReadLine());

int Result;

Result = Value1 + Value2;

Console.WriteLine("Sum of two Values:" + Result.ToString());

Console.ReadLine();

}

Output please enter the Number1 5 please enter the Number2 5 Sum of two Numbers:10

C# Code to numbers using for loop

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace T4Tutorials.com
{
    class Program
    {
        static void Main(string[] args)
        {
            int number, Result = 0;
            Console.WriteLine("Sum of 10 Numbers:.");

            for (int loop = 0; loop < 10; loop++)
            {
                Console.Write("Enter {0}. number:", loop + 1);
                number = Convert.ToInt32(Console.ReadLine());
                Result += number;

            }

            Console.WriteLine("Sum Of 10 Numbers:{0}", Result);
            Console.ReadLine();
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace T4Tutorials.com

{

class Program

{

static void Main(string[] args)

{

int number, Result = 0;

Console.WriteLine("Sum of 10 Numbers:.");

for (int loop = 0; loop < 10; loop++)

{

Console.Write("Enter {0}. number:", loop + 1);

number = Convert.ToInt32(Console.ReadLine());

Result += number;

}

Console.WriteLine("Sum Of 10 Numbers:{0}", Result);

Console.ReadLine();

}

Output Sum of 10 Numbers:. Enter 1. number:4 Enter 2. number:6 Enter 3. number:4 Enter 4. number:3 Enter 5. number:2 Enter 6. number:4 Enter 7. number:5 Enter 8. number:3 Enter 9. number:2 Enter 10. number:3 Sum Of 10 Numbers:36

Sum numbers using while loop in C#

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace T4Tutorials.com
{
    class Program
    {
        static void Main(string[] args)
        {

            int counter = 0;
            double result = 0;
            double number;
            Console.Write("Total Numbers you want to insert: ");
            double totalNumbers = Convert.ToDouble(Console.ReadLine());

            while (true)
            {
                if (counter == totalNumbers)
                {
                    break;
                }
                Console.Write("Number {0} : ", counter + 1);
                number = Int32.Parse(Console.ReadLine());
                result += number;
                counter++;

            }
            Console.WriteLine("===============================");
            Console.WriteLine("Sum of Numbers is {0} ", result);
            Console.WriteLine("Average of numbers is {0} ", (result / totalNumbers));
            Console.ReadKey();
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace T4Tutorials.com

{

class Program

{

static void Main(string[] args)

{

int counter = 0;

double result = 0;

double number;

Console.Write("Total Numbers you want to insert: ");

double totalNumbers = Convert.ToDouble(Console.ReadLine());

while (true)

{

if (counter == totalNumbers)

{

break;

}

Console.Write("Number {0} : ", counter + 1);

number = Int32.Parse(Console.ReadLine());

result += number;

counter++;

}

Console.WriteLine("===============================");

Console.WriteLine("Sum of Numbers is {0} ", result);

Console.WriteLine("Average of numbers is {0} ", (result / totalNumbers));

Console.ReadKey();

}

Output Total Numbers you want to insert: 5 Number 1 : 1 Number 2 : 2 Number 3 : 3 Number 4 : 4 Number 5 : 5

C# program to Add numbers using do while loop

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace T4Tutorials.com
{
    class Program
    {
        static void Main(string[] args)
        {
            int Result = 0;
            int No = 0;
            while (No < 10)
            {
                //Console.WriteLine(number);
                Result = Result + No;
                No++;
            }
            Console.WriteLine("the sum of the first 10 numbers is: " + Result);
        }
    }
}

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace T4Tutorials.com

{

class Program

{

static void Main(string[] args)

{

int Result = 0;

int No = 0;

while (No < 10)

{

//Console.WriteLine(number);

Result = Result + No;

No++;

}

Console.WriteLine("the sum of the first 10 numbers is: " + Result);

}

Output the sum of the first 10 numbers is: 45

C# Program to add two numbers
By: Prof. Dr. Fazal Rehman | Last updated: February 3, 2024