Added information about arrays (#32394)

* Added information about arrays

* added info about swift arrays

* added info about swift arrays

guide/english/swift/arrays/index.md

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+---
+title: Arrays
+---
+
+# Arrays
+
+Arrays are a collection type that stores elements of the **same type** in an **ordered list**.
+
+### Initialization
+
+```swift
+//create immutable array.
+let oddNumbers: [Int] = [1,3,5,7,9];
+let evenNumbers = [2,4,6,8];
+
+//create an empty mutable array
+var numbers = [Int]();
+```
+
+### Modification
+Add a single element to an array
+```swift
+let someNumber = 0
+numbers.append(someNumber)
+```
+
+Add multiple elements to an array
+```swift
+numbers += oddNumbers
+numbers.append(contentsOf: evenNumbers)
+```
+
+Remove and Insert at Index
+```swift
+//remove element from an array at index
+let removedInt = numbers.remove(at: 4)
+//insert element at specific index
+numbers.insert(removedInt, at: 4)
+```
+
+### Iteration
+
+You can iterate over a set using a for-in loop. Below are two different ways to do essentially the same thing.
+
+```swift
+var showNumbers = ""
+numbers = numbers.sorted() //sort the numbers in ascending order
+for i in 0..<numbers.count {
+    showNumbers += "\(numbers[i]) "
+}
+print(showNumbers);
+
+showNumbers = ""
+for i in numbers {
+    showNumbers += "\(numbers[i]) "
+}
+print(showNumbers);
+```
+
+The output(s) for the above are "0 1 2 3 4 5 6 7 8 9"
+
+#### More Information: 
+
+* [Arrays](https://docs.swift.org/swift-book/LanguageGuide/CollectionTypes.html#ID107)