What happens when you logical not a float?

Question

I assume this just returns an int. Is there anything else going on I should be aware of? C/C++ differences? float a = 2.5; !a; // What does this return? Int? Float?

Answer 1

The logical NOT operator (!) takes any expression as operand and evaluates its truth value before returning the negation of the truth value as output.

In C/C++ any int/float/long/double type variable with a non-zero value is regarded as TRUE. Therefore,

float a = 2.5; // when used with a boolean operator, this value is considered TRUE

!a; // returns FALSE