Python: Generate a 3D array

Last update on April 19 2025 13:02:46 (UTC/GMT +8 hours)

Generate 3D Array

Write a Python program to generate a 3*4*6 3D array whose each element is *.

Visual Presentation:

Sample Solution:

Python Code:

# Create a 3D array using list comprehensions, with 3 rows, 4 columns, and each element initialized as '*'
array = [[['*' for col in range(6)] for col in range(4)] for row in range(3)]

# Print the resulting 3D array
print(array)

Sample Output:

[[['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*', '*', '
*', '*', '*', '*']], [['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*'
, '*'], ['*', '*', '*', '*', '*', '*']], [['*', '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*'], ['*'
, '*', '*', '*', '*', '*'], ['*', '*', '*', '*', '*', '*']]]

Explanation:

array = [[ ['*' for col in range(6)] for col in range(4)] for row in range(3)]

In the above code -

The outermost range(3) loop creates 3 outermost lists, which represent the first dimension of the 3D array.
The second range(4) loop creates 4 sub-lists for each outermost list, representing the second dimension.
The innermost range(6) loop creates 6 innermost lists for each sub-list, representing the third dimension.
The ' * ' character is assigned to every element of the innermost list using the list comprehension.

So, the resulting array is a 3D array of size 3x4x6, with every element initialized to the character '*'.

Finally print() function prints the said array.

Flowchart:

For more Practice: Solve these Related Problems:

Write a Python program to generate a 3D array where each element is its coordinate sum.
Write a Python program to create a 3D array where each element is a random integer between 1 and 100.
Write a Python program to create a 3D array where each layer contains increasing numbers.
Write a Python program to create a 3D array with alternating 0s and 1s in each row.

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