Python: Product of the odd digits in n, or 0 if there aren't any
Python Programming Puzzles: Exercise-35 with Solution
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
Pictorial Presentation:
Sample Solution:
Python Code:
#License: https://bit.ly/3oLErEI
def test(n):
if any(int(c) % 2 for c in str(n)):
prod = 1
for c in str(n):
if int(c) % 2 == 1:
prod *= int(c)
return prod
return 0
n = 123456789
print("Original Number:",n)
print("Product of the odd digits in the said number, or 0 if there aren't any")
print(test(n))
n = 2468
print("\nOriginal Number:",n)
print("Product of the odd digits in the said number, or 0 if there aren't any")
print(test(n))
n = 13579
print("\nOriginal Number:",n)
print("Product of the odd digits in the said number, or 0 if there aren't any")
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
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Python: Tips of the Day
Find current directory and file's directory:
To get the full path to the directory a Python file is contained in, write this in that file:
import os dir_path = os.path.dirname(os.path.realpath(__file__))
(Note that the incantation above won't work if you've already used os.chdir() to change your current working directory, since the value of the __file__ constant is relative to the current working directory and is not changed by an os.chdir() call.)
To get the current working directory use
import os cwd = os.getcwd()
Documentation references for the modules, constants and functions used above:
- The os and os.path modules.
- The __file__ constant
- os.path.realpath(path) (returns "the canonical path of the specified filename, eliminating any symbolic links encountered in the path")
- os.path.dirname(path) (returns "the directory name of pathname path")
- os.getcwd() (returns "a string representing the current working directory")
- os.chdir(path) ("change the current working directory to path")
Ref: https://bit.ly/3fy0R6m
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