program to rotate an array by d element

class RotateArray { 
  
    void leftRotate(int arr[], int d, int n) 
    { 
        /* To handle if d >= n */
        d = d % n; 
        int i, j, k, temp; 
        int g_c_d = gcd(d, n); 
        for (i = 0; i < g_c_d; i++) { 
            /* move i-th values of blocks */
            temp = arr[i]; 
            j = i; 
            while (true) { 
                k = j + d; 
                if (k >= n) 
                    k = k - n; 
                if (k == i) 
                    break; 
                arr[j] = arr[k]; 
                j = k; 
            } 
            arr[j] = temp; 
        } 
    } 
  

  

    void printArray(int arr[], int size) 
    { 
        int i; 
        for (i = 0; i < size; i++) 
            System.out.print(arr[i] + " "); 
    } 
  
    int gcd(int a, int b) 
    { 
        if (b == 0) 
            return a; 
        else
            return gcd(b, a % b); 
    } 
  
    public static void main(String[] args) 
    { 
        RotateArray rotate = new RotateArray(); 
        int arr[] = { 1, 2, 3, 4, 5, 6, 7 }; 
        rotate.leftRotate(arr, 2, 7); 
        rotate.printArray(arr, 7); 
    } 
}