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Language-specific · 43

What makes Craykon different

Keywords in your own language, a null that stops calculations, a strict ==, and a switch that never falls through.

This lesson is for Craykon.
This lesson is about Craykon itself.
The other 7 languages have English keywords only (if, for, return).

Craykon lets you write keywords in your own language, and its null, == and switch are stricter than in other languages.
The example below takes a list of scores where absences (-) are stored as null, skips the nulls, grades the rest with switch, and prints the average.

n = Console.ReadLine().ToNumber();점수들 = [];for (i = 0; i < n; i++){    줄 = Console.ReadLine();    if (줄 == "-")    {        점수들.Add(null);    }    else    {        점수들.Add(줄.ToNumber());    }}합 = 0;낸사람 = 0;foreach (점수 in 점수들){    if (점수 == null)    {        Console.WriteLine("? " + 점수);        continue;    }    합 += 점수;    낸사람 += 1;    switch (Mathf.Floor(점수 / 10))    {        case 10:        case 9:            Console.WriteLine(점수 + " A");            break;        case 8:            Console.WriteLine(점수 + " B");            break;        default:            Console.WriteLine(점수 + " C");            break;    }}Console.WriteLine(합 / 낸사람);Console.WriteLine("85" == 85);

5
92
-
78
85
-

92 A
? 빈값
78 C
85 B
? 빈값
85
false

Key points

• Keywords can be written in your own language.
  You can even mix languages in one script and it is still the same program, so 만약 (n > 3) { Console.WriteLine(n); } runs fine.
• Only one program is stored and run, so when you change the screen language, the same code is printed again in that language.
  In the editor the same code can also be built from tiles, and you can switch between tiles and text while editing.
• null means 'no value' (Python's None).
  Calculating with null or comparing its size stops the program right there.
  Joining it to text does not stop; it shows as 빈값, Craykon's Korean name for null (the example's ? 빈값).
• == is strict.
  Values of different types are never equal, so 0 == false is false.
  Think of it as JavaScript's ===.
• switch runs only the matching case and never falls through, so you do not need break.
  List several values with commas, as in case 10, 9:.
• There is only one kind of number (a 64-bit floating-point number, as in JavaScript).
  7 / 2 is 3.5, so the tens digit is Mathf.Floor(score / 10) and integer division is Mathf.Quot(7, 2) (→ 3).
  Integers above 2^53 are not exact.

How each language writes it

Common mistakes

score = null;
Console.WriteLine(score + 1);

case = 3;

Console.WriteLine("85" == 85);

Practice