Page 96 - CTS - CSA TP - Volume 2

COMPUTER SOFTWARE APPLICATION - CITS

for (int i = 0; i < matrix.length; i++) {
for (int j = 0; j < matrix[i].length; j++) {
System.out.print(matrix[i][j] + “ “);
}

System.out.println(); // Move to the next line after printing each row
}
}
}

Output:

Explanation:
• A two-dimensional array in Java is an array of arrays. It is a matrix-like structure with rows and columns.
• In the above program, a 2D array named matrix is declared and initialized with integer values.

• The declaration int[][] matrix indicates that matrix is a two-dimensional array of integers.
• The array initializer { {1, 2, 3}, {4, 5, 6}, {7, 8, 9} } initializes the 2D array with three rows and three
columns.

• The outer loop for (int i = 0; i < matrix.length; i++) iterates over the rows of the array, and the inner loop
for (int j = 0; j < matrix[i].length; j++) iterates over the columns of each row.
• Within the nested loops, matrix[i][j] is used to access each element of the 2D array.
• The program prints each element of the 2D array row-wise, with each row printed on a separate line.

Two-dimensional arrays are commonly used to represent tabular data, matrices, grids, and other structured
data in Java programs. They offer a convenient way to organize and manipulate data in rows and columns. In
this example, the 2D array matrix represents a 3x3 matrix with integer values. The nested loops are used to
iterate over each element of the array and perform operations as needed.

TASK 2: Java program that allows the user to input two matrices through the keyboard and displays their
sum:
import java.util.Scanner;

public class MatrixSum {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
// Prompt the user to enter the dimensions of the matrices

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CITS : IT & ITES - Computer Software Application - Exercise 93