Hi, Why outputs 1 0 but not 101?

Question

https://code.sololearn.com/wFEi34OzgZ34/?ref=app

Answer 1

Hi, Thank You, Strong mind. - :)

Answer 2

Because null is evaluated as false. You can find more info here:https://www.php.net/manual/en/types.comparisons.php

Answer 3

You are welcome EGO 😉👍