How to resolve the algorithm N'th step by step in the Python programming language

Published on 12 May 2024 09:40 PM

How to resolve the algorithm N'th step by step in the Python programming language

Table of Contents

Problem Statement

Write a function/method/subroutine/... that when given an integer greater than or equal to zero returns a string of the number followed by an apostrophe then the ordinal suffix.

Returns would include 1'st 2'nd 3'rd 11'th 111'th 1001'st 1012'th

Use your routine to show here the output for at least the following (inclusive) ranges of integer inputs: 0..25, 250..265, 1000..1025

Note: apostrophes are now optional to allow correct apostrophe-less English.

Let's start with the solution:

Step by Step solution about How to resolve the algorithm N'th step by step in the Python programming language

Both code snippets provided solve the same problem: generating ordinal numbers in English for a given input number. Here's a detailed explanation of both code snippets:

Code Snippet 1:

_suffix = ['th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th']

def nth(n):
   return "%i'%s" % (n, _suffix[n%10] if n % 100 <= 10 or n % 100 > 20 else 'th')

if __name__ == '__main__':
   for j in range(0,1001, 250):
       print(' '.join(nth(i) for i in list(range(j, j+25))))

Explanation:

  • It uses a list _suffix to store the suffixes for different cases, such as "th," "st," "nd," etc.
  • The nth function takes an integer n and generates the ordinal number by combining the number with the appropriate suffix from _suffix.
  • It handles special cases where the number ends in 11, 12, or 13 and adds "th" instead of the usual suffix.
  • In the if __name__ == '__main__' block, it iterates through a range of numbers in steps of 250 (starting from 0) and prints the ordinal numbers for each number in that range, separated by spaces.

Code Snippet 2:

def ord(n):
   try:
       s = ['st', 'nd', 'rd'][(n-1)%10]
       if (n-10)%100//10:
           return str(n)+s
   except IndexError:
       pass
   return str(n)+'th'

if __name__ == '__main__':
   print(*(ord(n) for n in range(26)))
   print(*(ord(n) for n in range(250,266)))
   print(*(ord(n) for n in range(1000,1026)))

Explanation:

  • This code defines an ord function that takes an integer n and generates the ordinal number.
  • It uses a try-except block to handle different cases:
    • For numbers ending in 1, 2, or 3, it uses the suffixes "st," "nd," and "rd" from the list s.
    • For numbers ending in 11, 12, or 13, it adds "th" as the suffix.
    • For all other numbers, it adds "th" as the suffix.
  • In the if __name__ == '__main__' block, it prints the ordinal numbers for a range of numbers (26, 250-266, and 1000-1026).

Source code in the python programming language

_suffix = ['th', 'st', 'nd', 'rd', 'th', 'th', 'th', 'th', 'th', 'th']

def nth(n):
    return "%i'%s" % (n, _suffix[n%10] if n % 100 <= 10 or n % 100 > 20 else 'th')

if __name__ == '__main__':
    for j in range(0,1001, 250):
        print(' '.join(nth(i) for i in list(range(j, j+25))))


#!/usr/bin/env python3

def ord(n):
    try:
        s = ['st', 'nd', 'rd'][(n-1)%10]
        if (n-10)%100//10:
            return str(n)+s
    except IndexError:
        pass
    return str(n)+'th'

if __name__ == '__main__':
    print(*(ord(n) for n in range(26)))
    print(*(ord(n) for n in range(250,266)))
    print(*(ord(n) for n in range(1000,1026)))


  

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