Chapter 7: Problem 74

T F A two-dimensional array is like several identical arrays put together.

Short Answer

Expert verified

Explain your answer and provide an example of how to create and access elements in a two-dimensional array. Answer: Yes, it is true that a two-dimensional array can be visualized as several identical arrays put together, organized in rows and columns. For example, in the case of a 3x4 array, it could be imagined as three one-dimensional arrays with four elements each, lined up together. To create a 2D array in Python, you can use the following code: `myArray = [[0 for _ in range(4)] for _ in range(3)]`. To access an element (e.g., the element in the second row and third column), you can use this syntax: `value = myArray[1][2]`.

Step by step solution

1. Definition of a Two-Dimensional Array

A two-dimensional array is a data structure that can be visualized as a table, where data is stored in cells organized into rows and columns. Each cell represents an element in the array, and it can be accessed using two indices, one for rows and another for columns. This setup allows for more complex data organization and manipulation compared to a one-dimensional array.

2. Creating a Two-Dimensional Array

To create a two-dimensional array, you should first define its dimensions, which are the number of rows and columns. In most programming languages, you can create a two-dimensional array like this: In C++: ```cpp int myArray[3][4]; // Creates a 2D array with 3 rows and 4 columns ``` In Python: ```python myArray = [[0 for _ in range(4)] for _ in range(3)] # Creates a 2D array with 3 rows and 4 columns ```

3. Accessing Elements in a Two-Dimensional Array

To access an element in a two-dimensional array, you should provide both row and column indices, usually in the following format: array[row][column] For example, in a 3x4 array, to access the element located in the second row and third column, you would write: In C++: ```cpp int value = myArray[1][2]; // Accesses the element at the 2nd row and 3rd column ``` In Python: ```python value = myArray[1][2] # Accesses the element at the 2nd row and 3rd column ```

4. Conclusion

In conclusion, a two-dimensional array is like several identical arrays put together, organized in rows and columns. The statement "T F A two-dimensional array is like several identical arrays put together" is True (T) since it could be imagined as multiple one-dimensional arrays lined up together. Moreover, understanding how to create and access elements in a two-dimensional array is essential for working with more complex data structures.

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T F A two-dimensional array is like several identical arrays put together.

Short Answer

Step by step solution

1. Definition of a Two-Dimensional Array

2. Creating a Two-Dimensional Array

3. Accessing Elements in a Two-Dimensional Array

4. Conclusion

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