Python Exercise: Calculate the number of digits and letters in a string

Last update on April 17 2025 12:58:28 (UTC/GMT +8 hours)

14. Count Digits and Letters in a String

Write a Python program that accepts a string and calculates the number of digits and letters.

Pictorial Presentation:

Sample Solution:

Python Code:

# Prompt the user to input a string and store it in the variable 's'
s = input("Input a string")

# Initialize variables 'd' (for counting digits) and 'l' (for counting letters) with values 0
d = l = 0

# Iterate through each character 'c' in the input string 's'
for c in s:
    # Check if the current character 'c' is a digit
    if c.isdigit():
        # If 'c' is a digit, increment the count of digits ('d')
        d = d + 1
    # Check if the current character 'c' is an alphabet letter
    elif c.isalpha():
        # If 'c' is an alphabet letter, increment the count of letters ('l')
        l = l + 1
    else:
        # If 'c' is neither a digit nor an alphabet letter, do nothing ('pass')
        pass

# Print the total count of letters ('l') and digits ('d') in the input string 's'
print("Letters", l)
print("Digits", d)

Sample Output:

Input a string W3resource                                                                                                     
Letters 9                                                                                                                     
Digits 1 

Flowchart:

For more Practice: Solve these Related Problems:

• Write a Python program to accept a string and calculate separately the number of alphabetic characters and numeric digits.
• Write a Python program to iterate over a string and use isalpha() and isdigit() to count letters and digits.
• Write a Python program to use a dictionary to store counts of letters and digits from an input string.
• Write a Python program to output the counts of digits and letters in a string after filtering out whitespace and punctuation.

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Python Code Editor:

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