C# Programming

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Learned how to build code using visual studio.

Printing Text

• Whenever a line of instructions are done, always end with a semi-colon at the end.

• The command Console.WriteLine("Hello"); prints out text.

• The command Console.ReadLine(); is used to stop the console from terminating after the command is ran.

  • 
• The command dotnet run, in bash allows the execution of the C# Code.

  • 

using System;

namespace HelloWorld
{
  class Program
  {
    static void Main()
    {
      Console.WriteLine("My Name is Fabian");  
      Console.ReadLine();  
     }
  }
}
 

Variable Names

• string <name> = "John"

• int <name> = 13; Whole numbers, and negative numbers

  • int <name>;

    • <name> = 13;

• char <name> = 'A'; This stands for character.

• float, double, decimal these represent decimal numbers. They go from least accurate to most accurate.

• bool <name> = true or false;

User Input

• The command Console.ReadLine(); is used to read input that is why it is used to make the application stay still since it is reading the input.

• You can assign a variable name the command Console.ReadLine(); command and it will assign it.

• Once the variable is declared we can print it out using the Console.WriteLine($"{Variable-name}");

• Or alternatively Console.WriteLine("Your name is " + <variablename>)

• ORRRR Console.WriteLine("Your name is" + name + " and your " + age + "old");

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


namespace Giraffe
{
    class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("What is your name?");
            string name = Console.ReadLine();
            Console.WriteLine($"Your name is {name}");
            Console.ReadLine();
        }
    }


}

Comments

The syntax of comments are basically the same as C.

/* This is a comment */

Conditional Statements

using System;

namespace IfElseStatement
{
  class Program
  {
    static void Main(string[] args)
    {
      int people = 12;
      string weather = "bad";
      if (people <= 10 && weather == "nice")
      {
        Console.WriteLine("SaladMart");
      }
      else
      {
        Console.WriteLine("Soup N Sandwich");

      }
    }
  }
}

Switch Statements

Switch statements are easier for validating conditions and executing it rather than having it be a chain of if, else if, else if, else if, else.

string color;
 
switch (color)
{
   case "blue":
      // execute if the value of color is "blue"
      Console.WriteLine("color is blue");
      break;
   case "red":
      // execute if the value of color is "red"
      Console.WriteLine("color is red");
      break;
   case "green":
      // execute if the value of color is "green"
      Console.WriteLine("color is green");
      break;
   default:
      // execute if none of the above conditions are met
      break;
}