Welcome to JavaScript arrays! An array is a fundamental data structure that allows you to store multiple values in a single variable. Think of it as a container with numbered slots, where each slot can hold any type of data. The numbering starts from zero, so the first element is at index 0, the second at index 1, and so on.
Arrays can be created in several ways in JavaScript. The most common method is using square brackets with comma-separated values, called array literal notation. You can also use the Array constructor to create arrays. Empty arrays can be created for later use, and you can even create arrays with a specific size.
To access array elements, we use square bracket notation with the index number. For example, fruits[0] gives us the first element, and fruits[2] gives us the third element. We can also modify array elements by assigning new values to specific indices. This makes arrays very flexible for storing and manipulating data.
JavaScript arrays provide many useful methods for manipulation. The push method adds elements to the end, while pop removes from the end. Similarly, unshift adds to the beginning and shift removes from the beginning. The length property tells us how many elements are in the array. There are also methods like indexOf to find element positions and includes to check if an element exists.
Arrays can be created in several ways in JavaScript. The most common method is using square brackets with comma-separated values, called array literal notation. You can also use the Array constructor to create arrays. Empty arrays can be created for later use, and you can even create arrays with a specific size.