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## Variables
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### Instructions
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Declare and initialize following variables:
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- `obj` of type `Object` containing any value;
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- `planet` of type `String` containing planet's name you live on;
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- `year` of type `int` containing current year;
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- `lucky` of type `bool` containing true of false (you decide);
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- `pi` which is a constant of type `double` containing the value of pi with 2 decimal points;
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### Hints
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There are two ways to declare variables in Dart:
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```dart
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var strPatrick = 'Patrick';
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```
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```dart
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String strSpongebob = 'Spongebob';
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```
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- The first way declares using `var` which detects variable types automatically.
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- The second way explicitly declares the variable's type using the appropriate keyword, such as `String` for strings, as shown in the example.
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> Note: main is not needed!
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