Using Exclamation Marks '!' in C

Question

I have come across a problem involving exclamation marks and integers whilst reading a code in my reference book.

Let us say I have declared an integer variable name

Answer 1

The negation operator (!) simply just reverses the meaning of its operand.

The operand or the expression must be of arithmetic or pointer type. But the operand/result of expression is implicitly converted to data type bool (boolean 0 means false, Non zero means True).

The result is true if the converted operand is false; the result is false if the converted operand is true. The result is of type bool.

so

while(!number)
{
    ...
}

since variable number is 0 , while(!number) ie, !0 which is 'negation of 0' which is 'TRUE' then it code enters the while loop()