Why * is used?

Question

https://code.sololearn.com/cENC1tFtdCBe/?ref=app

Answer 1

here * is use for multiplication work.. is it your question?

Answer 2

BTW, the code is wrong, the test should be instead:
if((n/2)*2==n)

Then, if n is odd, n/2 is rounded down to the integer, so (n/2)*2 is n-1