How to print weekday in C# using switch

Overview

In C#, a weekday represents any number from 0 to 6. With this logic, we can say that 0 stands for Sunday, 1 for Monday, and so on.

Syntax

Below is the syntax of the switch statement:

switch(expression) 
{
  case x:
    // code block
    break;
  case y:
    // code block
    break;
  default:
    // code block
    break;
}
Syntax for Switch Statement in C#

Parameters

expression: This is evaluated once. It could be any expression that evaluates to a value that will be used by the case keyword.

case x, case y: These are values the expression evaluates. For every value, there is a case associated with it. Thus, every case has its own code block.

break: This means to stop the execution of a code block once it has been done for the particular case.

default: This is used when the expression does not evaluate to any value like x or y.

Example

Following is the switch use case for days of the week:

using System;
namespace MyApplication
{
  class Program
  {
    static void Main(string[] args)
    {
      // create a random week day value
     Random rnd = new Random();
     int wday  = rnd.Next(0,6);  // between 0 and 6
      switch (wday) 
      {
        case 0:
          Console.WriteLine("Sunday");
          break;
        case 1:
          Console.WriteLine("Monday");
          break;
        case 2:
          Console.WriteLine("Tuesday");
          break;
        case 3:
          Console.WriteLine("Wednesday");
          break;
        case 4:
          Console.WriteLine("Thursday");
          break;
        case 5:
          Console.WriteLine("Friday");
          break;
        case 6:
          Console.WriteLine("Saturday");
          break;
        default: 
          Console.WriteLine("Something went wrong!");
          break;
      }
      }    
  }
}

Explanation

  • Line 10: We create a random instance.
  • Line 11: We create a weekday value which is an integer. Its value is between 0 to 6, which are the 7 weekdays.
  • Line 12: We evaluate any value of the wday variable and the appropriate case is assigned once it is evaluated. For each case , we print the corresponding weekday to the console.
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