gwecode

courses / c# / level 1

level 1 · easy

c# for
beginners.

From zero to your first real C# programs. Every new word explained, every example runnable.

  • 28 lessons
  • 7 units
  • 3 h 24 m in all
  • £0, for good
start level 1

what’s inside.

For people who have never written a line of code. Nothing is assumed: every new word is explained the moment it appears.

C# Level 1 assumes nothing. In 28 short lessons you go from what code is to writing your own functions, with a guess, a hands-on task and a fix-the-bug challenge in every lesson. It ends with a level check: a tiny quiz game you build yourself.

every lesson goes the same way.

  1. meet it
  2. guess first
  3. your turn
  4. fix it
  5. nailed it

unit 1

Say hello

Make the computer do exactly what you tell it.

4 lessons · 27 min

  1. What code really is6 minFind out what code is and run your very first C# program.
  2. Your first line6 minMake the computer show any message you like.
  3. Printing more than once7 minShow several lines, blank lines and words that share a line.
  4. When it goes wrong8 minRead C#'s error messages and fix the ones you will see most.

unit 2

Boxes with names

Make the computer remember things.

4 lessons · 28 min

  1. A variable is a labelled box7 minStore a value under a name and get it back whenever you need it.
  2. Boxes can change7 minSwap what is in a box, copy boxes and join text together.
  3. Good names, bad names6 minChoose names C# accepts and people can understand.
  4. Asking a question8 minAsk the person a question and use their answer.

unit 3

Words and numbers

Tell text and numbers apart and use both.

4 lessons · 29 min

  1. Text vs numbers8 minTell text and numbers apart, and turn typed text into a number.
  2. Doing maths7 minAdd, take away, multiply and divide, and find what is left over.
  3. Tricks with text7 minShout, whisper, tidy up and measure your strings.
  4. Putting values inside text7 minDrop values and sums straight into your sentences.

unit 4

Make decisions

Make your program choose what to do.

4 lessons · 30 min

  1. If this, do that8 minMake your program do something only when it should.
  2. Otherwise…6 minGive your program a plan B for when the answer is no.
  3. More than two choices8 minCheck one thing after another and pick the right path.
  4. And, or, not8 minLink conditions together to ask smarter questions.

unit 5

Repeat yourself

Do the same thing many times without copying.

4 lessons · 30 min

  1. Counting with for8 minRepeat a block of code a set number of times.
  2. Repeating with while7 minKeep going for as long as something is true.
  3. Loops that decide8 minCheck every number in a loop and count the ones that match.
  4. Stopping early7 minLeave a loop halfway, or skip a turn you do not need.

unit 6

Arrays

Keep many things together and work through them.

4 lessons · 30 min

  1. Making an array7 minKeep a whole row of values together in one box.
  2. Reading and changing items8 minPick out one item by its position and swap it for another.
  3. Looping over an array7 minVisit every item in turn and add them all up.
  4. Searching an array8 minFind out whether an item is there, and find the biggest one.

unit 7

Your own commands

Wrap code up so you can use it again.

4 lessons · 30 min

  1. Making a function7 minWrap lines of code under one name and run them whenever you like.
  2. Giving it information7 minHand your function a value so it can do something new each time.
  3. Getting an answer back7 minMake a function hand you a result you can keep and use.
  4. Putting it all together9 minBuild a small program from functions, arrays, loops and decisions.
end of level 1 level check: a tiny quiz game Build one small project with everything from this level. Pass it and your face levels up. see the check

next, level 2

intermediate
c#.

Build useful C# programs with lists, dictionaries, your own classes, LINQ, exceptions and files.

see level 2