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Python: Find an integer with the given number of even and odd digits

Python Programming Puzzles: Exercise-88 with Solution

Write a Python program to find an integer (n >= 0) with the given number of even and odd digits.

Input: 
Number of even digits: 2 ,Number of odd digits: 3
Output:
22333

Input: 
Number of even digits: 4 ,Number of odd digits: 7
Output:
22223333333

Sample Solution:

Python Code:

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

def test(a,b):    
    return int(evens*"2"+odds*"3")   
evens = 2
odds = 3
print("Number of even digits:",evens,",Number of odd digits:",odds)
print("Integer(>= 0) with the given number of even and odd digits:")
print(test(evens, odds)) 
evens = 4
odds = 7
print("\nNumber of even digits:",evens,",Number of odd digits:",odds)
print("Integer(>= 0) with the given number of even and odd digits:")
print(test(evens, odds))

Sample Output:

Number of even digits: 2 ,Number of odd digits: 3
Integer(>= 0) with the given number of even and odd digits:
22333

Number of even digits: 4 ,Number of odd digits: 7
Integer(>= 0) with the given number of even and odd digits:
22223333333

Flowchart:

Flowchart: Python - Find an integer with the given number of even and odd digits.

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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