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33 of 40📚 JavaScript Arrays
📌 What are JavaScript Arrays?
JavaScript Array is a single variable that is used to store elements of different data types. Arrays are zero-indexed and are used when we have a list of items to manage.
JavaScript supports one-dimensional and multidimensional arrays (via arrays inside arrays).
🔸 Array Declaration Methods
1. Array Literal : Creates an array using square brackets.
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2. Array Constructor : Creates an array using the Array constructor.
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🔸 One-Dimensional Arrays
| Attribute | Value | Description |
|---|---|---|
Empty Array | var arr = []; | Declares an empty 1D array. |
With Alphabets | var arr = ["A", "B", "C", "D"]; | Array of alphabets. |
With Numbers | var arr = [1, 2, 3, 4, 5]; | Array of numbers. |
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🔸 Multidimensional Arrays - Method 1
Create Inner Arrays : Nested 1D arrays to form a 2D structure.
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🔸 Multidimensional Arrays - Method 2 (Array Literals)
Directly declare 2D array using array literals.
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🧠 Test Your Knowledge
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