Day 75: Python Program to Count the Number of Digits and Letters in a String

 

def count_digits_and_letters(input_string):

    digit_count = 0

    letter_count = 0

    for char in input_string:

        if char.isdigit():

            digit_count += 1

        elif char.isalpha():

            letter_count += 1

    return digit_count, letter_count

user_input = input("Enter a string: ")

digits, letters = count_digits_and_letters(user_input)

print(f"Number of digits: {digits}")

print(f"Number of letters: {letters}")

#source code --> clcoding.com 

Code Explanation:

def count_digits_and_letters(input_string):

This line defines a function named count_digits_and_letters that takes a single parameter, input_string. The function's purpose is to count the number of digits and letters in the given string.

    digit_count = 0

This line initializes a variable digit_count to 0. It will be used to keep track of the total number of digits in the string.

    letter_count = 0

This line initializes another variable letter_count to 0. It will be used to keep track of the total number of letters in the string.

    for char in input_string:

This line starts a for loop that iterates over each character in the string input_string. The loop processes one character (char) at a time.

        if char.isdigit():

This line checks if the current character (char) is a digit using the isdigit() method. If char is a digit, the condition evaluates to True, and the next line is executed.

            digit_count += 1

If the current character is a digit, this line increments the digit_count variable by 1, adding to the count of digits found so far.

        elif char.isalpha():

If the character is not a digit, this line checks if it is an alphabetic letter using the isalpha() method. If char is a letter, the condition evaluates to True, and the next line is executed.

            letter_count += 1

If the current character is a letter, this line increments the letter_count variable by 1, adding to the count of letters found so far.

    return digit_count, letter_count

After the loop finishes processing all characters in the string, this line returns a tuple containing the final values of digit_count and letter_count.

user_input = input("Enter a string: ")

This line prompts the user to enter a string using the input() function. The user's input is stored in the variable user_input.

digits, letters = count_digits_and_letters(user_input)

This line calls the count_digits_and_letters function with the user-provided string (user_input) as an argument. The function processes the string and returns two values (the count of digits and letters), which are stored in the variables digits and letters.

print(f"Number of digits: {digits}")

This line displays the number of digits found in the string. It uses an f-string to dynamically include the value of the digits variable in the message.

print(f"Number of letters: {letters}")

This line displays the number of letters found in the string. It uses an f-string to dynamically include the value of the letters variable in the message.