We can access the elements of a 2-dimensional array using row and column indices. It is similar to matrix element position but the only difference is that here indexing starts from 0. Syntax: array_name[i][j]; where, i: Index of row. j: Index of the column. Example: Below is the index of elements of the second row and third column. int x[1][2]; Let’s understand this using code by printing elements of a 2D array. Example of 2D Array // c++ program to illustrate the two dimensional array #include <iostream> using namespace std; int main() { int count = 1; // Declaring 2D array int array1[3][4]; // Initialize 2D array using loop for (int i = 0; i < 3; i++) { for (int j = 0; j < 4; j++) { array1[i][j] = count; count++; } } // Printing the element of 2D array for (int i = 0; i < 3; i++) { for (int j = 0; j < 4; j++) { cout << array1[i][j] << " "; } cout << endl; } return 0; } Output 1 2 3 4 5 6 7 8 9 10 11 12 Explanation: In the above code we have initialized the count by ‘1’ and declared a 2D array with 3 rows and 4 columns after that we initialized the array with the value of count and increment value of count in every iteration of the loop. Then we are printing the 2D array using a nested loop and we can see in the below output that there are 3 rows and 4 columns. Time Complexity: O(n*m) Space Complexity:O(n*m) where n is the number of rows and m is the number of columns.

There are several main important points of C++ multidimensional array in C++. Some main points of C++ multidimensional are as follows: Initializing an Array with Multiple Dimensions: You can initialize an array with multiple dimensions, such as three dimensions (a cube) or more. Although the startup and traversal concepts remain the same, each additional dimension would require its own loop. Getting to Elements: A multidimensional array's elements are accessed by utilizing their indices. Arr[i][j] denotes the element in a two-dimensional array's i-th row and j-th column. Size of Multidimensional Array and Storage: The number of elements along each dimension determines the size of a multidimensional array. The sum of all the array's allocated memory is calculated using the sizes of all its dimensions. Large arrays should be used with caution because they can use up a lot of memory. Array of Pointers: Arrays of pointers can also be used to generate multidimensional arrays. In this instance, each row of the array serves as a pointer to another array (the column).