Step by Step solution about How to resolve the algorithm Pangram checker step by step in the Python programming language

The provided Python code determines whether a given sentence is a pangram or not. A pangram is a sentence that contains every letter of the alphabet at least once.

Here's a step-by-step explanation of the code:

1. Importing Modules: The code starts by importing two modules:

   • string: This module contains various string-related constants and functions.
   • sys: This module provides information about the current Python environment and is used to check if the code is running in Python 2 or Python 3.

2. Checking Python Version: The code checks if the Python version is less than 3 (i.e., if it's Python 2). If it's Python 2, it modifies the input function to raw_input, which is used in Python 2 for getting user input.

3. Defining the ispangram Function: The code defines a function named ispangram that takes two parameters:

   • sentence: The sentence to be checked for pangram status.
   • alphabet (optional): The alphabet to use. By default, it uses the lowercase English alphabet (string.ascii_lowercase).

4. Converting the Sentence to Lowercase: Inside the ispangram function, the sentence is converted to lowercase using sentence.lower(). This ensures that the code is case-insensitive when checking for pangram status.

5. Creating a Set of the Alphabet: The code creates a set of the alphabet characters using the set function. A set is a data structure that stores unique elements, so it ensures that each alphabet character appears only once.

6. Checking Subset Relationship: The code then checks if the set of the alphabet characters (alphaset) is a subset of the set of characters in the lowercase sentence (set(sentence.lower())). If alphaset is a subset, it means that every alphabet character is present in the sentence, making it a pangram.

7. Getting User Input: The code prompts the user to enter a sentence using input('Sentence: ' ). The user's input is passed as an argument to the ispangram function.

8. Printing the Result: The code prints the result of the ispangram function, which is a boolean value indicating whether the sentence is a pangram (True) or not (False).

import string, sys
if sys.version_info[0] < 3:
    input = raw_input

def ispangram(sentence, alphabet=string.ascii_lowercase):
    alphaset = set(alphabet)
    return alphaset <= set(sentence.lower())

print ( ispangram(input('Sentence: ')) )