Hello. I don't know how to return false statement? It always return true.

Question

https://code.sololearn.com/cmULKSQWS4ZZ/?ref=app

Answer 1

if (sum != sum) returns false

Answer 2

TeaserCode If sum is not equal to sum, then it returns zero as the first output, and that is the same as false.

Answer 3

if(sum != num )

Answer 4

I still don't know how does it work.
It always returns 1.