Create Arrays.md

Add Java code snippet for 
1. Declaration and then Initialization one dimentional arrays
2. Declaration with Initialization
3. Using the new Keyword
4. How to print elements of an Array in Java Using a For Loop

Author: nimeshkavindu

Arrays.md

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+# Arrays
+
+## **What is an Array?**
+
+An array is the simplest data structure where a collection of similar data elements takes place and each data element can be accessed directly by only using its index number.
+
+## One-Dimensional Arrays
+
+### **1. Declaration and then Initialization**
+
+First, you declare an array by specifying the data type of its elements, followed by square brackets `[ ]` (which indicate it's an array), and then the array's name. After declaring, you can initialize it by allocating memory with the `new` keyword and specifying the size of the array.
+
+```java
+// Declaration
+int[] myArray;
+int myArray1[];
+// Initialization
+myArray = new int[5]; // Allocate memory for 5 integers
+```
+
+### **2. Declaration with Initialization**
+
+You can declare an array and immediately initialize it with values. In this case, the size of the array is inferred from the number of values provided.
+
+```java
+// Declare and initialize an array with 5 elements
+int[] myArray1 = new int[]{1, 2, 3, 4, 5};
+
+int[] myArray = {1, 2, 3, 4, 5};
+```
+### **3. Using the `new` Keyword**
+
+For more dynamic scenarios, where you might not know the values upfront but know the size of the array, you can use the **`new`** keyword to allocate memory for the array. You can then assign values to each element using their indices.
+
+```java
+// Declare and allocate memory for an array of 5 elements
+int[] myArray = new int[5];
+
+// Initialize elements
+myArray[0] = 10;
+myArray[1] = 20;
+myArray[2] = 30;
+myArray[3] = 40;
+myArray[4] = 50;
+```
+
+## **How to print elements of an Array in Java?**
+
+### **1. Using a For Loop**
+
+You can iterate over the array using a traditional `for` loop and print each element individually.
+
+```java
+public class Main {
+    public static void main(String[] args) {
+        int[] numbers = {10, 20, 30, 40, 50};
+
+        // Using a for loop to print elements
+        System.out.println("Using for loop:");
+        for (int i = 0; i < numbers.length; i++) {
+            System.out.println("Element at index " + i + ": " + numbers[i]);
+        }
+    }
+}
+
+