Using == outside of an if statement?

Question

I've only ever seen "==" being used inside an if statement. So how does "==" work in this context?

a = 5;
b = (a == 18 % 13);

Answer 1

If b is a bool, you can assign the result of an expression to it. In this case, if the condition a == 18 % 13 holds, b will become true, otherwise false.

Basically,

a == 18 % 13 - would yield b = true or b = 1

and

a != 18 % 13 - would yield b = false or b = 0

depending on the type of b.

Answer 2

This

a == 18 % 3

is equivalent to

a == (18%3)

since the modulus operator % has higher precedence than the equality operator ==.

This expression evaluates to true or false (actually, true in this case). So you are assigning the result of that to variable b. b itself could be a bool or anything that can be converted from bool.