# Définitions fonctions def majuscule(p_ch:str) -> str: ch_construite = "" for char in p_ch: if 97 <= ord(char) <= 122: # lowercase ch_construite += chr(ord(char) - 32) else: ch_construite += char return ch_construite def minuscule(p_ch:str) -> str: ch_construite = "" for char in p_ch: if 65 <= ord(char) <= 90: # uppercase ch_construite += chr(ord(char) + 32) else: ch_construite += char return ch_construite # Programme principal une_chaine = input("Saisir qqch: ") retour = majuscule(une_chaine) print(retour) retour = minuscule(une_chaine) print(retour)