C# Array Operations

arrays

//Reverse
public static void Main(string[] args)
    {
        Console.WriteLine ("Hello Mono World");
        int[] arr = {1,3,4,9,8};
        //Initialize an identical array
        int[] reversed = new int[5];
        //Use this to keep the indexes
        int j = 0;
        //Iterate the initial array from end to the start
       for (int i = arr.Length; i > 0; i = i - 1) 
        {
          //Push into the reversed array
          reversed[j] = arr[i-1];
          //Increment the index
          j = j+1;
        }
        Console.WriteLine(string.Join(",", reversed));
    }


//Rotate by 1
public static void Main(string[] args)
    {
        Console.WriteLine ("Hello Mono World");
        int[] arr = {1,3,4,9,8};
        //So if you are to rotate this by 1 element clockwise, then push one last element of the array and push it into the front
        //In the previous example, take 8 out and push it before 1
        //  int[] arr = {8,1,3,4,9};
        int rotatedElement = arr[arr.Length -1]; 
        
        for (int i = arr.Length -1; i > 0; i = i - 1) 
        {
            arr[i] = arr[i-1];
        }
        
        arr[0]= rotatedElement;

        Console.WriteLine(string.Join(",", arr));
    }


//Find Max
public static void Main(string[] args)
    {
        Console.WriteLine ("Hello Mono World");
        int[] arr = {1,3,4,9,8};

        int max = 0;
        
        for (int i = 0; i < arr.Length -1; i = i + 1) 
        {
           if(arr[i] > max){
               max = arr[i];
           }
        }
        
        Console.WriteLine(max);
    }


//Find Min
public static void Main(string[] args)
    {
        Console.WriteLine ("Hello Mono World");
        int[] arr = {1,3,4,9,8};

        int min = arr[0];
        
        for (int i = 0; i < arr.Length -1; i = i + 1) 
        {
           if(arr[i] < min){
               min = arr[i];
           }
        }
        
        Console.WriteLine(min);
    }

Stacks

//Reverse an array using a stack
 public static void Main(string[] args)
    {
        Console.WriteLine ("Hello Mono World");
        int[] arr = {1,3,4,9,8};

        Stack myStack = new Stack();
        
        for (int i = 0; i < arr.Length; i = i + 1) 
        {   
            myStack.Push(arr[i]);
        }
        while(myStack.Count > 0)
        {
            Console.WriteLine(myStack.Pop());
        }

    }