script_22.py - Character Type Detector

Code

#!/usr/bin/env python3
"""Character type detector"""

char = input("Enter a character: ")

if len(char) == 1:
    if char.isdigit():
        print(f"{char} is a digit")
    elif char.isalpha():
        print(f"{char} is a letter")
    elif char.isspace():
        print("This is a whitespace character")
    else:
        print(f"{char} is a special character")
else:
    print("Please enter only one character")

Explanation

Line 4: char = input("Enter a character: ") - char is string type - Can contain any characters

Line 6: if len(char) == 1: - len() returns integer (string length) - Validates user entered exactly one character - Outer guard clause

Line 7: if char.isdigit(): - .isdigit() is string method returning boolean - Returns True if string contains only digit characters (0-9) - For single character: checks if it's 0, 1, 2, 3, 4, 5, 6, 7, 8, or 9 - Nested if (inside the length validation)

Line 9: elif char.isalpha(): - .isalpha() is string method returning boolean - Returns True if string contains only alphabetic characters (a-z, A-Z) - Checks both uppercase and lowercase letters - False for digits, symbols, spaces

Line 11: elif char.isspace(): - .isspace() is string method returning boolean - Returns True for whitespace characters: space, tab, newline - Examples: " ", "\t", "\n" - Returns False for all other characters

Line 13: else: (inner) - Executes when character is not digit, not letter, not whitespace - Must be special character/symbol - Examples: !, @, #, $, %, &, *, (, ), etc.

Line 15: else: (outer) - Handles when user entered zero characters or multiple characters - Guard against invalid input length