Variable
- Variables hold values like names, numbers, or results that can change.
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let Keyword
- let declares a variable limited to the current block or function.
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const Keyword
- const defines data that never changes during execution.
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var Keyword
- var declares a variable function-wide, used before ES6.
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Data Types
- JavaScript has strings, numbers, booleans, arrays, and objects.
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String
- Strings store characters inside quotes, like "Hello World".
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Number
- Numbers include integers, decimals, and negatives.
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Boolean
- Booleans store logic results for decisions.
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