<commit_before><commit_msg>Started adding list of functions<commit_after># Exercises

1. return - make the function return a value. **Done** [return]
2. if - nested if statements **Done** [if]
3. array-length - return the length of an integer array [arrays]
4. 
{'fraction_non_alphanumeric': 0.11494252873563218, 'fraction_numerical': 0.01532567049808429, 'mean_word_length': 4.458333333333333, 'pattern_counts': {'":': 0, '<': 3, '<?xml version=': 0, '>': 3, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '152372', 'n_tokens_mistral': 80, 'n_tokens_neox': 78, 'n_words': 34}