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Java Multidimensional Arrays

Multidimensional arrays are arrays that contain other arrays as their elements. The most common type is the two-dimensional array, which can be used to represent data in a table or matrix form.

Key Topics

1. Declaring Multidimensional Arrays

int[][] matrix;
String[][][] cube;

2. Initializing Multidimensional Arrays

int[][] matrix = {
    {1, 2, 3},
    {4, 5, 6},
    {7, 8, 9}
};

3. Accessing Elements

Access elements using multiple indices.

int value = matrix[0][1]; // Accesses element in first row, second column
System.out.println("Value: " + value); // Outputs: Value: 2

4. Looping Through Multidimensional Arrays

Use nested loops to iterate over multidimensional arrays.

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();
}

Key Takeaways

  • Multidimensional arrays store data in a grid or matrix form.
  • Access elements using multiple indices.
  • Nested loops are commonly used to traverse multidimensional arrays.
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