can argv[0] be null in C?

[chaturengg]

argv[0] contains the name used to invoke the program. Is there any circumstance
that it possible that it will contain null string “”?

[Banfa]

Yep if you call main yourself. That is only allowable in C, that is the C++ standard prohibits calling main recursively but the C standard does not as such you could all it yourself with a blank argv[0].

But the first time main is called argv[0] will always contain the program name.