fixing docs issues

docs/types/number.md

@@ -5,6 +5,22 @@
 The [show number](/reference/basic/show-number) function displays a number on the [LED screen](/device/screen). 
 For example, this code displays the number 42:
 
-```blocks
+```block
 basic.showNumber(42);
 ```
+
+### #declareexample
+
+```block
+let num = 42;
+basic.showNumber(42);
+```
+
+### #functionreturnexample
+
+For example the following code gets the display brightness 
+(using the [brightness function](/reference/led/brightness)) and stores the value in a variable named `brightness`:
+
+```block
+let brightness = led.brightness()
+```

docs/types/var.md

@@ -0,0 +1,9 @@
+# @extends
+
+### #letexample
+
+A variable is created for the number returned by the [brightness](/reference/led/brightness) function.
+
+```block
+let b = led.brightness();
+```