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JavaScript Data Structures
JavaScript Data Structures
Understanding Arrays
Arrays are versatile data structures used to store and manipulate collections of values. They are commonly used for managing lists of some items. Here, we will explore the creation of arrays and how to access their elements.
Creating Arrays
We can create an array using square brackets []
, known as array literals. Commas should separate elements within the array.
Here, the sport
array contains three elements: "basketball", "hockey", and "cricket".
Accessing Array Elements
We can access specific elements within an array by using square brackets with the element's index. Array indices start at 0, meaning the first element has an index of 0, the second element has an index of 1, and so on.
const motorcycleBrands = ["Harley-Davidson", "Honda", "Kawasaki", "Suzuki"]; console.log(motorcycleBrands[0]); // Output: Harley-Davidson console.log(motorcycleBrands[1]); // Output: Honda console.log(motorcycleBrands[2]); // Output: Kawasaki console.log(motorcycleBrands[3]); // Output: Suzuki
In this example, we access the elements of the motorcycleBrands
array using their indices.
- The first element is accessed with
motorcycleBrands[0]
; - The second with
motorcycleBrands[1]
; - The third with
motorcycleBrands[2]
; - The forth with
motorcycleBrands[3]
.
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