Python: Product of the odd digits in n, or 0 if there aren't any

Last update on May 30 2025 11:49:59 (UTC/GMT +8 hours)

Product of Odd Digits

Write a Python program to compute the product of the odd digits in a given number, or 0 if there aren't any.

Input:  
123456789
Output:
945

Input:  
2468
Output:
0

Input:  
13579
Output:
945

Visual Presentation:

Sample Solution:

Python Code:

#License: https://bit.ly/3oLErEI

# Define a function named 'test' that takes an integer 'n' as input
def test(n):
    # Check if any digit in the number is odd
    if any(int(c) % 2 for c in str(n)):
        # Initialize a variable 'prod' to store the product of odd digits
        prod = 1
        # Iterate over each digit in the number
        for c in str(n):
            # If the digit is odd, multiply it with the current product
            if int(c) % 2 == 1:
                prod *= int(c)
        # Return the final product of odd digits
        return prod
    # Return 0 if there are no odd digits in the number
    return 0

# Assign a specific integer 'n' to the variable
n = 123456789

# Print a message indicating the operation to be performed
print("Original Number:", n)

# Print a message indicating the operation to be performed
print("Product of the odd digits in the said number, or 0 if there aren't any:")
# Print the result of the test function applied to 'n'
print(test(n))

# Assign another specific integer 'n' to the variable
n = 2468

# Print a message indicating the operation to be performed
print("\nOriginal Number:", n)

# Print a message indicating the operation to be performed
print("Product of the odd digits in the said number, or 0 if there aren't any:")
# Print the result of the test function applied to 'n'
print(test(n))

# Assign another specific integer 'n' to the variable
n = 13579

# Print a message indicating the operation to be performed
print("\nOriginal Number:", n)

# Print a message indicating the operation to be performed
print("Product of the odd digits in the said number, or 0 if there aren't any:")
# Print the result of the test function applied to 'n'
print(test(n))

Sample Output:

Original Number: 123456789
Product of the odd digits in the said number, or 0 if there aren't any
945

Original Number: 2468
Product of the odd digits in the said number, or 0 if there aren't any
0

Original Number: 13579
Product of the odd digits in the said number, or 0 if there aren't any
945

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to compute the product of all odd digits in an integer; return 0 if no odd digits exist.
• Write a Python program to extract odd digits from a number and calculate their product using a loop.
• Write a Python program to convert a number to a string, filter odd digits, and then compute their product.
• Write a Python program to implement the product calculation for odd digits recursively and return 0 if none are found.

Go to:

• Python Puzzles Exercises Home ↩
• Python Exercises Home ↩

Previous: Find the sum of the numbers among the first k with more than 2 digits.
Next: Find the largest k numbers.

Python Code Editor :

Have another way to solve this solution? Contribute your code (and comments) through Disqus.