Coding 101 4

Welcome to Coding 101 - It's the TWiT show that gives YOU the knowledge to live in the wonderful world of the programmer. This week we are reviewing For Loops, and checking out If (then) Else Statements.

Reviewing For Loops

How do I download and compile my first code on a Mac? Download the C# Compiler from the MonoDevelop website.

• Choose the Xamarin Studio package and download it.
• Click on the Mono + GTK# download link.
• Download the Intel Mac: Runtime or SDK links and install.
• Once all three programs are installed, open the Xamarin Studio application.
• From the main page, choose New, C#, Console Application.
• Start writing your code!

My For Loop looks like this:

using System;
namespace TWiT.Tv.Coding101 {
  class Coding101Example3 {
    static void Main(string[] args) {
      for (int counter = 1; counter <= 100; counter++) {
        Console.Write("The count is currently ");
        Console.WriteLine(counter);
      }
      Console.ForegroundColor = ConsoleColor.Magenta;
      Console.WriteLine("\nType <enter> to Exit.");
      Console.ResetColor();
      //Reset the console color to the default.
      Console.ReadKey();
    }
  }
}

This is a very simple For Loop that I wrote to simply count up from 1 to 100. The integer starts at 1. The count will continue as long as the number is equal to or less than 100. The count will add one (++) each time it loops in the code. The loop will state "The count is currently (number)" each time the loop continues. Once the loop hits 100, it will end. Try this yourself, and change the integer and counter!

We're happy to present our first viewer submission! This one is from Douglas in our Google+ Community. He made ASCII art! Try it yourself with the code pasted here.

Find the Code for ALL of our episodes HERE!

Ivory Tower

If (then) Else Statements

int UserInput;
console.writeline("Input a number greater than 0");
console.read (UserInput);
if (UserInput > 0)
  console.writeline("Well Done!");
else
  console.writeline("That's not above zero");

1. initialize an int variable "UserInput"
2. write "Input a number greater than 0"
3. push input to "UserInput"
4. check if "UserInput" is greater than 0
5. if it is, then write "Well Done!"
6. if it is not, then write "That's not above zero"

int UserInput;
console.writeln("Input a number between 1 and 10");
console.read (UserInput);
if (UserInput < 0)
  console.writeln("A number between 1 and 10");
else
  if (UserInput > 10)
    console.writeln("A number between 1 and 10");
  else
    console.writeln("Well Done!");

1. initialize an int variable "UserInput"
2. write "Input a number greater than 0"
3. push input to "UserInput"
4. check if "UserInput" is less than 0 5
   1. if it is, then write "A number between 1 and 10"
   2. if it is not, then check if "UserInput" is greater than 10
      1. if it is, then write "A number between 1 and 10"
      2. if not, then write "Well Done!"

Programming the WORLD! (With Flowcharts)

Go through the logic chain for Allowing a Cell phone to Ring

When do you NOT want your phone to ring.

1. When Driving - Does the Accelerometer detect motion? Does the GPS indicate more than 40mph velocity?
2. When Sleeping - Does the Camera detect light? Does the WiFi radio detect the home AP? Is it after 10:00pm? Does the microphone detect snoring?
3. When in a meeting - Does the calendar indicate a meeting?

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• Transcripts: Coding 101 4 (Transcript)