seed: curriculum content

1.solar-system/2.first-light/08.the-formatter/index.md

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+---
+type: challenge
+title: "The Formatter"
+xp: 50
+duration: 25
+difficulty: 2
+---
+
+# The Formatter
+
+> **[INCOMING — Mission Control, Earth]**
+>
+> Cadet, raw numbers like `9.99` print fine, but `29.970000000000002`
+> doesn't. Real programs *format* numbers. f-strings can do it inline:
+>
+> ```python
+> price = 9.99
+> f"${price:.2f}"   # → "$9.99"
+> ```
+>
+> The `:.2f` is a *format spec*: two decimal places, fixed-point.
+>
+> Implement `format_receipt(price, qty)` that returns a 3-line string:
+>
+> ```
+> Item price: $<price>
+> Quantity: <qty>
+> Total: $<price * qty>
+> ```
+>
+> Both prices use 2-decimal formatting. Use `\n` to join lines.
+>
+> [END TRANSMISSION]
+
+## Your Task
+
+Open `starter/starter.py`. Compute `total`, then return a single
+f-string with `\n` separators.
+
+## Objectives
+
+- `format_receipt(9.99, 3)` returns the exact 3-line string
+- Prices format to 2 decimal places
+- Works for any positive `price` and `qty`