Why?

Question

I faced the below problems in my solo learn challenge can someone explain the reason behind the answer?

https://www.sololearn.com/post/331458/?ref=app

Answer 1

In C, all non-null values are considered to be true, so both 2 and 4 are converted accordingly, thus the entire condition is true as well. Then, the boolean equivalent for true is one, hence the output.

Answer 2

Shadow now i get it, thanks mate