2D-Array-Matrices

Aim:

To study and implement C++ 2D Array - Matrices.

Software Used:

Visual Studio Code.

Theory:

A 2D array in C++ is an array of arrays, meaning it's a collection of elements arranged in a grid or table with rows and columns. This type of array is commonly referred to as a matrix.

Syntax:

data_type array_name[rows][columns];

#include<iostream>
using namespace std;
int main()
{
    int i,j;
    int arr[2][3];

    cout<<"Enter 6 numbers: ";
    for(i=0;i<2;i++)
    {
        for(j=0;j<3;j++)
        {
            cin>>arr[i][j];
        }
    }
    for(i=0;i<2;i++)
    {
        for(j=0;j<3;j++)
        {
            cout<<arr[i][j]<<" ";
        }
        cout<<endl;
    }
}

Algorithms:

Displaying a string:

Step 1: Start.

Step 2: Declare a 2D integer array arr with 2 rows and 3 columns.

Step 3: Declare integer variables i and j for loop counters.

Step 4: Display the message "Enter 6 numbers: " to prompt the user for input.

Step 5: Use a nested for loop to input values into the 2D array arr:
Outer loop: Iterate i from 0 to 1 (for each row).
Inner loop: Iterate j from 0 to 2 (for each column within the current row).
Step 5.1: In each iteration of the inner loop, take input from the user and store it in arr[i][j].

Step 6: Use another nested for loop to print the elements of the 2D array:
Outer loop: Iterate i from 0 to 1 (for each row).
Inner loop: Iterate j from 0 to 2 (for each column within the current row).
Step 6.1: In each iteration of the inner loop, print the value of arr[i][j] followed by a space.
Step 6.2: After the inner loop completes (i.e., after printing all elements in a row), print a newline to move to the next row.

Step 7: End.