Question

python

1. Create an empty list of size 100 × 200 with all zeroes.

2. How do you access the 4th row and 2nd column of a 2D list called

3. Write a function called printList that takes as a parameter a 2D list and prints it to screen in row/column format.

4. Create a multiplication table of size 10 × 10 that has all the products from 1 times 1 all the way up to 10 times 10.

5. Create a 2D list (matrix) of size 100 × 100 with entries 0 except along the main diagonal which should be 1.

Answer 1

1.

rows, cols = (100, 200) #dimensions of list.

list = [[0]*cols]*rows #creating list with 0's.

print(list[4][2]) #accessing 4th row and 2nd column.

output:

2.

rows, cols = (5, 5) #dimensions of list.

list = [[0]*cols]*rows #creating list with 0's.

#printing the list in row column format.
for i in range(0,5):
for j in range(0,5):
print(list[i][j]," ",end='')
print()

output:

3.

#multiplication table from 1 times 1 to 10 times 10.
for i in range(1,11):
for j in range(1,11):
print(i, 'x', j, '=', i*j)

output:

Answer 2

To accomplish the tasks you've described in Python, follow the steps below:

1. Create an empty list of size 100x200 with all zeroes:

pythonCopy codeempty_list = [[0 for _ in range(200)] for _ in range(100)]

2. Access the 4th row and 2nd column of a 2D list:

Remember that Python uses zero-based indexing, so the 4th row and 2nd column would be accessed like this:

pythonCopy codevalue = your_2d_list[3][1]

3. Write a function called printList to print a 2D list in row/column format:

pythonCopy codedef printList(lst):    for row in lst:        print(' '.join(str(elem) for elem in row))# Example usage:# printList(your_2d_list)

4. Create a multiplication table of size 10x10:

pythonCopy codemultiplication_table = [[(i + 1) * (j + 1) for j in range(10)] for i in range(10)]

5. Create a 2D list (matrix) of size 100x100 with entries 0 except along the main diagonal which should be 1:

pythonCopy codematrix = [[1 if i == j else 0 for j in range(100)] for i in range(100)]

These code snippets should help you accomplish the tasks you mentioned. Feel free to integrate them into your Python program or use them as needed.

Answer 3

Here's a Python program that fulfills the requirements:

1. Create an empty list of size 100 × 200 with all zeroes:

pythonCopy coderows = 100columns = 200two_d_list = [[0 for j in range(columns)] for i in range(rows)]

2. Access the 4th row and 2nd column of a 2D list:

pythonCopy codeelement = two_d_list[3][1]  # Rows and columns are 0-indexed, so the 4th row is at index 3, and the 2nd column is at index 1.

3. Write a function called printList to print a 2D list:

pythonCopy codedef printList(two_d_list):    for row in two_d_list:        print(" ".join(map(str, row)))  # Convert integers to strings and join them with spaces

4. Create a multiplication table of size 10 × 10:

pythonCopy codesize = 10multiplication_table = [[i * j for j in range(1, size + 1)] for i in range(1, size + 1)]

5. Create a 2D list (matrix) of size 100 × 100 with entries 0 except along the main diagonal which should be 1:

pythonCopy codesize = 100matrix = [[1 if i == j else 0 for j in range(size)] for i in range(size)]

You can use these snippets or combine them to create a complete Python program. For example:

pythonCopy codedef printList(two_d_list):    for row in two_d_list:        print(" ".join(map(str, row)))# Create an empty list of size 100 × 200 with all zeroesrows = 100columns = 200two_d_list = [[0 for j in range(columns)] for i in range(rows)]# Access the 4th row and 2nd column of the 2D listelement = two_d_list[3][1]# Print the 2D list using the printList functionprintList(two_d_list)# Create a multiplication table of size 10 × 10size = 10multiplication_table = [[i * j for j in range(1, size + 1)] for i in range(1, size + 1)]# Create a 2D list (matrix) of size 100 × 100 with entries 0 except along the main diagonal which should be 1size = 100matrix = [[1 if i == j else 0 for j in range(size)] for i in range(size)]

Feel free to use these code snippets and modify them according to your needs.