1. Introduction

Reversing an array is a fundamental operation in computer science and can be used in various algorithms and problem-solving scenarios. Scala, with its fusion of functional and object-oriented programming paradigms, provides multiple ways to reverse an array. Here, we'll look at a straightforward method to achieve this.

2. Program Steps

1. Initialize the Scala environment.

2. Create a sample array.

3. Utilize the reverse method to reverse the elements of the array.

4. Display the original and reversed array.

5. Execute the program.

3. Code Program

``````object ArrayReverseApp {
def main(args: Array[String]): Unit = {
// Sample array
val numbers = Array(1, 2, 3, 4, 5)

// Reverse the array
val reversedNumbers = reverseArray(numbers)

println(s"Original Array: \${numbers.mkString("[", ", ", "]")}")
println(s"Reversed Array: \${reversedNumbers.mkString("[", ", ", "]")}")
}

def reverseArray(arr: Array[Int]): Array[Int] = {
arr.reverse
}
}

``````

Output:

```Original Array: [1, 2, 3, 4, 5]
Reversed Array: [5, 4, 3, 2, 1]
```

Explanation:

1. We define an ArrayReverseApp object as our main program container.

2. Inside the main function, we initialize a sample array named numbers.

3. The reverseArray function is defined to take an array as an input and return its reversed version. For this, it uses the built-in reverse method provided by Scala's Array class.

4. Both the original and reversed arrays are printed to the console using the mkString method, which is a convenient way to convert arrays to strings with custom delimiters.