reverse an array or string

// Iterative java program to reverse an 
// array 
public class GFG { 
	
/* Function to reverse arr[] from 
	start to end*/
	static void rvereseArray(int arr[], 
					int start, int end) 
	{ 
		int temp; 
		
		while (start < end) 
		{ 
			temp = arr[start]; 
			arr[start] = arr[end]; 
			arr[end] = temp; 
			start++; 
			end--; 
		} 
	}	 
	
	/* Utility that prints out an 
	array on a line */
	static void printArray(int arr[], 
							int size) 
	{ 
		for (int i = 0; i < size; i++) 
			System.out.print(arr[i] + " "); 
		
		System.out.println(); 
	} 

	// Driver code 
	public static void main(String args[]) { 
		
		int arr[] = {1, 2, 3, 4, 5, 6}; 
		printArray(arr, 6); 
		rvereseArray(arr, 0, 5); 
		System.out.print("Reversed array is \n"); 
		printArray(arr, 6); 
		
	} 
} 

// This code is contributed by Sam007