Question

For what values of the expression is an if-statement block not executed?

(a) 0 and all negative values

(b) 0 and -1

(c) 0

(d) 0, all negative values, all positive values except 1

I have been asked this question at a job interview.

My enquiry is from Booleans topic in chapter Types, Pointers, Arrays & Structures in C++ of C++

Answer 1

Correct choice is (c) 0

Best explanation: The if-statement block is only not executed when the expression evaluates to 0. its just syntactic sugar for a branch-if-zero instruction.