← 🐍 Python World

🐍 Word Ruler

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📖 The mission

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Functions return answers

A function is a tiny machine: it receives inputs, works something out, then returns one answer for the tests to check.

💡 Hint ladder

len(word) measures a word.
List comprehension: [len(w) for w in words]

🧪 Coach checks

◯ hi there
◯ empty list
◯ three words

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💬 A list comprehension builds a new list from an old one in one line.

words = ["hi", "there"]

print([w.upper() for w in words])   # ['HI', 'THERE']
print([w[0] for w in words])        # ['h', 't']
print(len("there"))                 # 5

📟 It printed:

📟 Output