Write a programExercise 3/4Elementary20 XP

Checking the sides of a rectangle

Task

Write a function obsah_obdlznika(a, b) that returns the area of a rectangle. If either side is zero or negative, the function returns nothing and raises a ValueError with the message Strana musí byť kladná. (a side must be positive) instead.

The tests also call the function with bad sides and check both the type of the exception and its message.

Examples

Call
```
print(obsah_obdlznika(3, 4))
```
Expected output
```
12
```

Call

try:
    obsah_obdlznika(-1, 4)
    print("bez výnimky")
except ValueError as e:
    print("ValueError:", e)

Expected output

ValueError: Strana musí byť kladná.

After you submit, 4 hidden tests will also check your solution: a zero side, both sides negative, a decimal side, a tiny positive side.

You need to know

Python starts the first time you run code.

def obsah_obdlznika(a, b):
    pass
# Kód pod touto podmienkou sa spustí, keď program spustíš ty. Testy ho preskočia
# a tvoje funkcie zavolajú priamo.
if __name__ == "__main__":
    print(obsah_obdlznika(3, 4))

Ctrl+Enter runs the program. Tab indents. Press Esc, then Tab, to leave the editor.

Input (stdin)

Each line = one call to input().

Output

Hints

Try it yourself first. Each hint reveals a little more - and lowers the reward a little.

Signed out, hints are free - but no XP is awarded either.

Solution

The solution unlocks after the last hint.