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@ -37,6 +37,11 @@ let notSure: any = 4;
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notSure = "maybe a string instead";
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notSure = "maybe a string instead";
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notSure = false; // okay, definitely a boolean
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notSure = false; // okay, definitely a boolean
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// When we are not sure about the type, and don't want to use "any", we can use "unknown" type
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let unknownVariable: unknown = 'Some string'; // we don't fully know yet the type
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unknownVariable = 2; // possible
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const someVariable: string = unknownVariable; // Invalid; we can't assign unknownVariable to any other type (without an explicit assertion), unlike any
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// Use const keyword for constants
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// Use const keyword for constants
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const numLivesForCat = 9;
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const numLivesForCat = 9;
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numLivesForCat = 1; // Error
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numLivesForCat = 1; // Error
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