I don't know?!

Question

I have no idea what error am I seeing

https://code.sololearn.com/cPIV1Wf8djVC/?ref=app

Answer 1

There is no operator ** in java. If you trying power of operator then use Math.pow() method which returns double value.

Answer 2

** is from python ;)

4**2 in Java:
Math.pow(4,2)
It returns a double.