STRANGE OUTPUT when using the POW function !!! (Sololearn code playground)

Question

This problem happened on sololearn's code playground
I tried to print the powers of 10 using the pow function
But for some powers like 2,4,7,8,9 the output was the real answers -1 (99, 9999...)

https://code.sololearn.com/cpgbKSC5QiqU/?ref=app

Why does this happen?! any ideas?

Answer 1

pow returns a double. Don't feed it with integers.
edit: k must be double. Forgot to add that.

Answer 2

Thanks, It works now, although what happened with the integer is still weird 😅