Java Array

Java Arrays : 

• In Java, an array is a data structure that stores a fixed-size sequential collection of elements of the same type.
• Arrays are used to store multiple values in a single variable, allowing easy access to individual elements by an index.
• They provide a way to store and manipulate collections of data more efficiently than using individual variables.

Use of Arrays in real life : 

• Databases
• Lists and Collections
• Image and Sound Processing
• Games and Graphics  etc.
  

Declaring and Initializing Arrays:

Declaration :

To declare an array in Java, you specify the data type of the elements followed by square brackets [] and the array name.

Initialization:

There are a few ways to initialize an array in Java:

Using the new keyword:

With array literals: 

Accessing Array Elements:

Elements in an array are accessed by their index, starting from 0 to the length of the array minus 1.

Array Length:

The length of an array can be obtained using the length attribute.

Iterating Through an Array:

You can loop through an array using various types of loops, like for loop or enhanced for loop.

Using a for loop:

Using an enhanced for loop (for-each loop):

Firstly we have to understand , What is for-each loop ?  

• The "for-each" loop, also known as the enhanced for loop, is a concise way to iterate through elements of arrays or collections in Java.
• It simplifies the process of looping through each element without the need for explicit indexing or manually controlling the loop counter.

Here's a simple explanation of how the for-each loop works in Java:

Here's what's happening in this example:

• int num declares a variable num of type int to hold each element in the  myArray array.
  
• myArray  is the array that you want to traverse.
• The loop automatically goes through each element in the myArray array one by one, assigning each element's value to the num variable.
• Inside the loop, System.out.println(num); prints each element of the array.