About Lesson
An array is a data structure that allows you to store a fixed number of values of the same data type under a single variable name. Each value in an array is called an element, and each element is accessed by its index number.
int[] myArray = new int[5];Uses of Array
Arrays are used in Java and many other programming languages for several reasons:
- Grouping related data
- Efficient access
- Fixed-size
- Iteration
- Passing to functions
Advantages and Disadvantages of Array
Advantages of arrays:
- Efficient memory usage
- Fast element access
- Iteration
- Data organization
- Passing to functions
Disadvantages of arrays:
- Fixed-size
- Wasted memory
- Homogeneous data type
- Lack of flexibility
- Sorting
Types of Array
In Java, there are two types of arrays:
- Single-Dimensional Arrays
int[] numbers = new int[5];
- Multi-Dimensional Arrays
int[][] matrix = new int[3][4];
Types of Array Input
there are different ways to initialize an array with input values:
- Static initialization
- Dynamic initialization
- Reading from a file
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