Exercise 12-01:
Modify the previous program to recognize letter sequences. A letter is a character between A and Z or between a and z (you must account for uppercase and lowercase letters). Ignore accented characters. Print a list with the strings of letters found.
Answer:
##############################################################################
# Python From Scratch
# Author: Nilo Ney Coutinho Menezes
# Editora Novatec (c) 2010-2025 - LogiKraft 2025
# Site: https://pythonfromscratch.com
# ISBN: 978-85-7522-949-1 (Paperback), 978-85-7522-950-7 (hardcover), 978-85-7522-951-4 (ebook)
#
# File: chapter 12/exercise-12-01.py.py
##############################################################################
input_string = "ABC431DEF901c431203FXEW9"
output = []
number = []
for character in input_string:
if "a" <= character.lower() <= "z":
if not number:
output.append(number)
number += character
elif number:
number = []
for found in output:
print("".join(found))