1. Write a program to print “Hello World” and exit on key press.
using System;
namespace ConsoleApplication
{
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Hello World");
Console.ReadKey();
}
}
}2. Write a program to print the sum of 2 numbers taken as input from user.
using System;
namespace ConsoleApplication
{
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Enter the first number");
var number1 = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Enter the first number");
var number2 = Convert.ToSingle(Console.ReadLine());
var sum = number1 + number2;
Console.WriteLine("Sum : {0}", sum);
Console.ReadKey();
}
}
}3. Write a C# Sharp program to print the result (quotient and remainder) of dividing two numbers
using System;
namespace ConsoleApplication
{
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Enter the first number");
var number1 = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Enter the first number");
var number2 = Convert.ToSingle(Console.ReadLine());
var quotient = number1 / number2;
var remainder = number1 % number2;
Console.WriteLine("Quotient : {0}", quotient);
Console.WriteLine("Remainder : {0}", quotient);
Console.ReadKey();
}
}
}4. Write a C# Sharp program to swap two numbers
Solution 1 : Using a third variable
using System;
namespace ConsoleApplication
{
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Enter the first number");
var number1 = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Enter the first number");
var number2 = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Before Swapping");
Console.WriteLine("Number 1 : {0}", number1);
Console.WriteLine("Number 2 : {0}", number2);
var temp = number1 ;
number1 = number2;
number2 = temp;
Console.WriteLine("After Swapping");
Console.WriteLine("Number 1 : {0}", number1);
Console.WriteLine("Number 2 : {0}", number2);
Console.ReadKey();
}
}
}
Solution 2: Without use of third variable
using System;
namespace ConsoleApplication
{
internal class Program
{
private static void Main(string[] args)
{
Console.WriteLine("Enter the first number");
var number1 = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Enter the first number");
var number2 = Convert.ToSingle(Console.ReadLine());
Console.WriteLine("Before Swapping");
Console.WriteLine("Number 1 : {0}", number1);
Console.WriteLine("Number 2 : {0}", number2);
number1 = number1 + number2;
number2 = number1 - number2;
number1 = number1 - number2;
Console.WriteLine("After Swapping");
Console.WriteLine("Number 1 : {0}", number1);
Console.WriteLine("Number 2 : {0}", number2);
Console.ReadKey();
}
}
}