arrays - What is meaning of expression (!array_name[index]) in C?

Question

Can somebody help me understand that what is the meaning of the expression:

if(!done[i])

Where done is an array containing integer elements, i is the index which ranges from 0 to 500 and done is an uninitialized array and only the last element is explicitly filled as 0.

Thanks in advance.

Answer 1

if(done[i])

is the same as

if(done[i] != 0)

So,

if(!done[i])

is the same as

if(done[i] == 0)