Project 2: Temperature Converter

Project 2: Temperature Converter

Convert Celsius to Fahrenheit (and back) with a clean menu.

The goal

Ask the user which direction to convert and a temperature, then print the result rounded to one decimal.

What you practice

• if / elif / else branches
• float conversion
• Math: (c 9) / 5 + 32 and (f - 32) 5 / 9
• round()

Starter code

print("1. Celsius to Fahrenheit")
print("2. Fahrenheit to Celsius")
choice = input("Choose 1 or 2: ")

if choice == "1":
    c = float(input("Celsius: "))
    f = (c * 9) / 5 + 32
    print(f"{c} C is {f:.1f} F")
elif choice == "2":
    f = float(input("Fahrenheit: "))
    c = (f - 32) * 5 / 9
    print(f"{f} F is {c:.1f} C")
else:
    print("Unknown choice")

Step-by-step

1. Run the starter and test both conversions with 0 and 32.
2. Add a guard that rejects choices that aren't "1" or "2".
3. Wrap the float conversion in a try/except.
4. Re-run with nonsense input to confirm it doesn't crash.

Checklist

• [ ] Both conversion formulas are used
• [ ] The choice branch works
• [ ] Results print with one decimal
• [ ] Bad input is handled
• [ ] The program runs without errors

TL;DR

• Branch with if/elif/else.
• Convert strings with float().
• :.1f formats to one decimal.