19 lines
590 B
Python
19 lines
590 B
Python
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# The periodic table of elements.
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periodicTable = {
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"H": "Hydrogen", "C": "Carbon", "O": "Oxygen",
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"Fe": "Iron", "Au": "Gold", "Na": "Sodium",
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"Ag": "Silver", "Pb": "Lead", "Pu": "Plutonimum"
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}
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# Use the prompt "Enter symbol (or Q to quit): "
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# Print either "Invalid symbol." if an error occurs
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# or "element = element name" ("%s = %s")
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element = input("Enter symbol (or Q to quit): ")
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while element != "Q":
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try:
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print(element, "=", periodicTable[element])
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except KeyError:
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print("Invalid symbol.")
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element = input("Enter symbol (or Q to quit): ")
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