more docs

.gitignore

@@ -12,4 +12,4 @@ xcuserdata
 #So we don't accidentally commit our private keys
 *.gpg
 .gigaide
-.kotlin
+/kotlin-js-store/yarn.lock

docs/tutorial.md

@@ -98,17 +98,43 @@ There is a set of assigning operations: `+=`, `-=`, `*=`, `/=` and even `%=`.
 
 Notice the parentheses here: the assignment has low priority!
 
-## Expression details
+## Math
 
 It is rather simple, like everywhere else:
 
     val x = 2.0
-    //
     sin(x * π/4) / 2.0
     >>> 0.5
 
 See [math](math.md) for more on it. Notice using Greek as identifier, all languages are allowed.
 
+Logical operation could be used the same
+    
+    val x = 10
+    ++x >= 11
+    >>> true
+
+## Supported operators
+
+|    op    | ass | args              |
+|:--------:|-----|-------------------|
+|    +     | +=  | Int or Real       |
+|    -     | -=  | Int or Real       |
+|    *     | *=  | Int or Real       |
+|    /     | /=  | Int or Real       |
+|    %     | %=  | Int or Real       |
+|    &&    |     | Bool              |
+|   \|\|   |     | Bool              |   
+|    !x    |     | Bool              |
+|    <     |     | String, Int, Real |
+|    <=    |     | String, Int, Real |
+|    >=    |     | String, Int, Real |
+|    >     |     | String, Int, Real |
+|    ==    |     | Any               |
+|    !=    |     | Any               |
+| ++a, a++ |     | Int               |
+| --a, a-- |     | Int               |
+
 # Variables
 
 Much like in kotlin, there are _variables_:
@@ -137,7 +163,8 @@ Same as in kotlin:
 
     val HalfPi = π / 2
 
-Note using greek characters in identifiers! All letters allowed, but remember who might try to read your script, most likely will know some English, the rest is the pure uncertainty.
+Note using greek characters in identifiers! All letters allowed, but remember who might try to read your script, most
+likely will know some English, the rest is the pure uncertainty.
 
 # Defining functions
 
@@ -161,7 +188,9 @@ There are default parameters in Ling:
         else
             "more" 
     }
-    >>> Callable@...
+    assert( "do: more" == check(10, "do: ") )
+    check(120)
+    >>> answer: enough
 
 ## Closures
 
@@ -219,7 +248,6 @@ As everywhere else, and as expression:
 
 Notice returned value `void`: it is because of `println` have no return value, e.g., `void`.
 
-
 Or, more neat:
 
     var count = 3
@@ -247,7 +275,8 @@ We can break as usual:
     }
     >>> void
 
-Why `void`? Because `break` drops out without the chute, not providing anything to return. Indeed, we should provide exit value in the case:
+Why `void`? Because `break` drops out without the chute, not providing anything to return. Indeed, we should provide
+exit value in the case:
 
     var count = 0
     while( count < 50 ) {
@@ -310,11 +339,13 @@ We can skip the rest of the loop and restart it, as usual, with `continue` opera
     total
     >>> 0
 
-Notice that `total` remains 0 as the end of the outerLoop@ is not reachable: `continue` is always called and always make Ling to skip it.
+Notice that `total` remains 0 as the end of the outerLoop@ is not reachable: `continue` is always called and always make
+Ling to skip it.
 
 ## Labels@
 
-The label can be any valid identifier, even a keyword, labels exist in their own, isolated world, so no risk of occasional clash. Labels are also scoped to their context and do not exist outside it.
+The label can be any valid identifier, even a keyword, labels exist in their own, isolated world, so no risk of
+occasional clash. Labels are also scoped to their context and do not exist outside it.
 
 Right now labels are implemented only for the while loop. It is intended to be implemented for all loops and returns.