C++ Program to Print a 2D Array

Printing a 2D array in C++ is similar to printing a 1D array, but instead of a single loop, you use nested loops to iterate over the rows and columns of the 2D array.

Here’s an example program that demonstrates how to print a 2D array:

#include <iostream>

int main() {

    // Define the 2D array

    int arr[3][3] = {

        {1, 2, 3},

        {4, 5, 6},

        {7, 8, 9}

    };

    // Define the dimensions of the array

    int rows = 3;

    int cols = 3;

    // Print the 2D array

    std::cout << “2D array:” << std::endl;

    for (int i = 0; i < rows; i++) {

        for (int j = 0; j < cols; j++) {

            // Print the element at [i][j]

            std::cout << arr[i][j] << ” “;

        }

        // Print a new line after each row

        std::cout << std::endl;

    }

    return 0;

}

Here’s how the program works:

• The program starts by defining a 2D array (arr) with 3 rows and 3 columns, and some example values.
• The rows and cols variables are used to specify the number of rows and columns in the array.
• A nested loop is used to iterate over the 2D array.
  • The outer loop iterates over each row of the array.
  • The inner loop iterates over each column of the current row.
  • Each element at position [i][j] in the array is printed, followed by a space.
• After printing all the elements in a row, a new line is printed to separate rows visually.
• This continues until all rows are printed, resulting in the 2D array being displayed in a matrix-like format.