seed: curriculum content

1.solar-system/2.first-light/10.the-calculator/index.md

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+---
+type: challenge
+title: "The Calculator"
+xp: 100
+duration: 35
+difficulty: 2
+---
+
+# The Calculator
+
+> **[INCOMING — Mission Control, Earth]**
+>
+> Cadet, capstone. Combine everything you've learned in this module
+> into one program.
+>
+> Implement `calculate(a, b)` that returns a dictionary with all four
+> basic operations:
+>
+> ```python
+> {
+>     "sum":        a + b,
+>     "difference": a - b,
+>     "product":    a * b,
+>     "quotient":   a / b,
+> }
+> ```
+>
+> Convert both inputs with `float()` so results are consistent — and
+> so string inputs work too.
+>
+> [END TRANSMISSION]
+
+## Your Task
+
+In `starter/starter.py`, convert both inputs to float, then return
+the dictionary with the four keys above.
+
+## Objectives
+
+- `calculate(10, 5)` returns the four operations as a dict
+- Works with int, float, and string inputs
+- All values are floats

1.solar-system/2.first-light/10.the-calculator/starter/starter.py

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+def calculate(a, b):
+    """Return a dict with the four basic operations on (a, b).
+
+    Convert both inputs with float() so output is consistent.
+
+    Returned dict has these exact keys:
+      "sum"        — a + b
+      "difference" — a - b
+      "product"    — a * b
+      "quotient"   — a / b
+
+    calculate(10, 5) -> {"sum": 15.0, "difference": 5.0,
+                        "product": 50.0, "quotient": 2.0}
+    """
+    pass

1.solar-system/2.first-light/10.the-calculator/testing/test_solution.py

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+from solution import calculate
+
+
+def test_returns_dict_with_four_keys():
+    r = calculate(10, 5)
+    assert set(r.keys()) == {"sum", "difference", "product", "quotient"}
+
+
+def test_basic_ten_five():
+    r = calculate(10, 5)
+    assert r["sum"] == 15.0
+    assert r["difference"] == 5.0
+    assert r["product"] == 50.0
+    assert r["quotient"] == 2.0
+
+
+def test_seven_two():
+    r = calculate(7, 2)
+    assert r["sum"] == 9.0
+    assert r["difference"] == 5.0
+    assert r["product"] == 14.0
+    assert r["quotient"] == 3.5
+
+
+def test_decimals():
+    r = calculate(3.5, 1.5)
+    assert r["sum"] == 5.0
+    assert r["difference"] == 2.0
+    assert r["product"] == 5.25
+
+
+def test_string_inputs_converted():
+    r = calculate("10", "5")
+    assert r["sum"] == 15.0