A two-dimensional array, also known as a matrix, is a data structure that organizes elements in rows and columns, forming a grid-like structure. It allows us to store and access multiple values in a structured manner.
Declaring a Two-Dimensional Array
In most programming languages, you can declare a two-dimensional array by specifying the number of rows and columns.
For example, in Python:
matrix = [[0 for _ in range(4)] for _ in range(3)] # Creates a 3x4 matrix with elements initialized to 0
Accessing Elements in a Two-Dimensional Array
To access individual elements in a two-dimensional array, you need to specify both the row and column index.
value = matrix[1][2] # Retrieves the element at the second row and third column (indices start from 0)
Iterating Through a Two-Dimensional Array
You can use nested loops to iterate through all the elements in a two-dimensional array.
The outer loop controls the rows, while the inner loop controls the columns.
for i in range(len(matrix)): for j in range(len(matrix[i])): print(matrix[i][j], end=" ") print()
# This code will print all the elements in the two-dimensional array, row by row.
2D Array
Which indexing is used in a 2 dimensional array?
What is the index of the first element in a 2 dimensional array?
How do you access an element in a 2 dimensional array?
