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## Variables
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### Instructions
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You can declare variables in two ways. The type can be implicitly detected using the `var` keyword, or explicitly by declaring the variable's type:
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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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Declare and initialize the following variables:
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- `obj` of type `Object`, containing any value.
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- `planet` of type `String`, containing the name of the planet you live on.
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- `year` of type `int`, containing the current year.
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- `lucky` of type `bool`, containing `true` or `false` (you decide).
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- constant `pi` of type `double`, containing pi value with 2 decimal places
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> No main is needed.
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