Started writing some docs

_getting_started/quick-start-guide.md

@@ -10,15 +10,81 @@ To help you start using Toy as fast as possible, here are the most useful elemen
 
 ## Keyword 'print'
 
+The `print` keyword takes one value as a parameter, which is sent to stdout by default.
+
+The value can be redirected elsewhere using the [debug C API](c_api/debug).
+
+```toy
+print "Hello World!";
+```
+
 ## Keyword 'assert'
 
+The `assert` keyword takes two values as parameters, separated by a comma. If the first value is `null` or `false`, the second parameter is sent to stderr by default. Otherwise, this statement is ignored.
+
+The second value, which is replaced by a default error message if omitted, can be redirected elsewhere using the [debug C API](c_api/debug).
+
+The generation of assert statements can be disabled using the [parser C API](c_api/parser).
+
+```toy
+assert 1 < 2;
+
+assert null, "Hello world!";
+```
+
 ## Variables and Types
 
+Values can be stored in variables, by specifying a name with the `var` keyword. The name can also be declared with a type, which restricts what kind of value can be stored in the name. Types are optional, and defaults to `any` when not used.
+
+```toy
+var answer = 42;
+
+var question: string = "How many roads must a man walk down?";
+```
+
+To make a variable unchangeable after declaration, you can add the `const` keyword after the type.
+
+```toy
+var quote: string const = "War. War never changes.";
+```
+
+The usable types are as follows:
+
+| type | name | description |
+| --- | --- | --- |
+| `bool` | boolean | Either `true` or `false`. |
+| `int` | integer | Any whole number, representable by a signed 32-bit integer. |
+| `float` | float | A decimal number, represented by 32-bits for floating-point arithmetic. |
+| `string` | string | A piece of text, supports UTF-8. |
+| `array` | array | A series of values stored in sequential memory. |
+| `table` | table | A series key-value pairs stored in such a way that allows for fast lookups. Booleans, functions and opaques can't be used as keys. |
+| `function` | function | A chunk of code to be called. It can take multiple parameters, and provide multiple return values. Unlike other variables, functions are declared with the `fn` keyword. |
+| `opaque` | opaque | The contents of this value is unusable in the script, but can be passed from one API to another. |
+| `any` | any | The default type used when none is specified. This type can hold any value. |
+
+*Note: Functions and opaques are not yet implemented at the time of writing.*
+
 ## Control Flow
 
+Watch this space.
+
+```
+if-then-else
+while
+for //not yet implemented
+continue
+break
+```
+
 ## Functions
 
+Watch this space.
+
 ## External Libraries and Extending Toy
 
+Watch this space.
+
 ## Reserved Keywords & Operators
 
+Watch this space.
+