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Python Challenges: Compute the sum of the two reversed numbers and display the sum in reversed form

Python Challenges - 1: Exercise-22 with Solution

Write a Python program to compute the sum of the two reversed numbers and display the sum in reversed form.

Note: The result will not be unique for every number for example 31 is a reversed form of several numbers of 13, 130, 1300 etc. Therefore all the leading zeros will be omitted.

Explanation:

Python : Sum of the two reversed numbers

Sample Solution:-

Python Code:

def reverse_sum(n1, n2):
    return int(str(int(str(n1)[::-1]) + int(str(n2)[::-1]))[::-1])

print(reverse_sum(13, 14))
print(reverse_sum(130, 1))
print(reverse_sum(305, 794))

Sample Output:

27      
23      
1

Flowchart:

Python Flowchart: Compute the sum of the two reversed numbers and display the sum in reversed form

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Previous: Write a Python program to check a sequence of numbers is a geometric progression or not.
Next: Write a Python program where you take any positive integer n, if n is even, divide it by 2 to get n / 2. If n is odd, multiply it by 3 and add 1 to obtain 3n + 1. Repeat the process until you reach 1.

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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