## 1 - Variables Variables defined using #= can't be changed (they are "final"), while the ones affected using the normal operator (=) can. ``` helloworld #= "Hello, World!" ``` ## 2 - (Anonymous) Functions You can make an anonymous functions using the following syntax: ``` getHelloWorld: ~String #= { return "Hello, World!" } ``` The type (`~String` here, which basically means "an anonymous function that returns a String") can be omitted, see [#3](#3---types). To define a **named** (and mandatorily final) function, replace `#=` with `>>`: ``` getHelloWorld: String >> { return "Hello, World!" } ``` ### 2.1 - Function parameters Parameters can be added to an anonymous function by specifying the types as follows: ``` addIntToString: (int, String)~ #= { a, b; print_line(b + a) } ``` Named functions can have parameters **(with mandatory names)** like in this example: ``` addIntToString(a: int, b: String) => { print_line(b + a) } ``` ### 2.2 - Function calls A function can be simply invoked like this if it has no parameters: ``` helloWorld() ``` If a function does have parameters, you can call it with arguments in the right order; if the function is not anonymous, it's also possible to call it by using the names of the corresponding parameters: ``` addNumbers(int a, int b, int c, int d) >> { print_line(a + b + c + d) } addNumbers(1, 2, 3, 4) # Call without names addNumbers(a = 1, b = 2, c = 3, d = 4) # Call with names addNumbers(1, c = 3, b = 2, d = 4) ``` Note that print and print_line are the only functions that will get transpiled to their equivalents. ## 3 - Types Types are *inferred*, which means that specifying types of variables or returned values is optional. Note: While primitives types (`String`, `int`, `double`, `boolean`, `float`) will be transpiled to their equivalents for the target of the transpiler, this is not the case for other types. Every variable has a static type by default at compile time; it is possible to make a **non-final** variable dynamic by adding `dyn`/`dynamic` to the attributes or making it the return type: ``` dyn helloWorld = 0 # helloWorld: dyn = 0 would also work helloWorld = "Hello, World!" ``` The attributes/return types mentioned above can also be used for functions/anonymous functions: ``` helloWorld: ~dynamic => { return 0 } dyn helloWorld >> { return 0 } # could be written as helloWorld: dyn >> { return 0 } ``` ## 4 - Comments You can add comments to your code; see the following examples showcasing the available syntaxes: ``` # This is a simple comment // This is another comment int ** This is a compact comment, you can insert it pretty much anywhere ** a = 1 ``` ## 5 - Classes A class can be made with one of the `class` and `structure` keywords, its name, optional constructors (`~()`) where you can add parameters + code that will run when the class is instantiated, and the class body where you can define methods, properties etc: ``` class Program { hello #= "Hello" ~(str: String): () { print(", $str!\n") } ~() { print(hello) } } program #= Program("World") ```