max_repeated_character.py

def max_repeated_character(word):
    
    # Validate that provided word is not an empty string
    if word != "":
    
        # Initialize variables
        repeated_character = word[0]
        character_repeated_times = 1
        max_repeated_times = 1

        # Loop through all characters in word provided
        for i in range(len(word)-1):

            # Check if the next immediate character is equal to the current character
            if word[i] == word[i+1]:
                character_repeated_times +=1

                # Update variables if applicable
                if character_repeated_times > max_repeated_times:
                    max_repeated_times = character_repeated_times
                    repeated_character = word[i]

            # Restart counter if the next immediate character is not equal to the current character
            else:
                character_repeated_times = 1
                
        return (repeated_character, max_repeated_times)
    
    # In case that the user provided an empty string
    else:
        
        return "Error! The provided word must have at least one character."