Class 2. Dart Language: Variables, Data Type, Control flow & functions

<li>Variables: Initialization, final
<li>Data Types: Numbers, Strings, Enumerated types, Boolean, Arrays
<li>Nullable and Non-nullable types
<li>Data type operators: Arithmetic, Relational, Type test, Logical, Bitwise and shift
<li>Show the Best practices
<li>Condition Statement: if, switch
<li>Loop: for, while, for-in
<li>Assertions
<li>The Function type
<li>Anonymous functions
<li>Optional parameters: Named parameters, Positional parameters
<li>Nested functions
<li>Using typedefs
<li>Good Practices