C# Operator Example

The main objective of this chapter is to explain you in details about how to use C# operators in a program.

1. Write a program to check whether input character is vowel or not.

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using System;

namespace Example1
{
  class Program
   {
     static void Main(string[] args)
      {
        char ch;

        Console.Write("Enter a character: \t");
        ch = Convert.ToChar(Console.ReadLine());

        if (ch == 'a' || ch == 'A' || ch == 'e' ||ch == 'E' || ch == 'i' || ch == 'I' ||                      ch == 'o' || ch == 'O' || ch == 'u' || ch=='U')
         {
           Console.WriteLine("\n\n{0} is vowel",ch);
         }
        else
         {
           Console.WriteLine("\n\n{0} is not vowel",ch);
         }
        Console.ReadLine();
      }
   }
}

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Output

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Enter a character :     E


E is vowel

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2.Calculate area of Rectangle

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using System;

namespace Example2
{
  class Program
   {
     static void Main(string[] args)
      {
        int height, width, area;

        Console.Write("Enter height:\t");
        height = Convert.ToInt32(Console.ReadLine());

        Console.Write("Enter width:\t");
        width = Convert.ToInt32(Console.ReadLine());

        area = height * width;

        Console.WriteLine("\nArea of Rectangle is {0}",area);
        Console.ReadLine();
      }
   }
}

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Output

 

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Enter height :   5
Enter width :    6

Area of Rectangle is 30

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