Why alert(!(4%2)) returns true?

Question

I got it right in challenges but don't understand the logic behind it.

Answer 1

What's 4 % 2? zero right? in term of boolean, zero was false and other non-zero values were true.

And then there's the unary logical NOT operator ! whose work was to invert whatever operand it was given, and since it is a logical operator, it gives back a boolean.

So !( 4 % 2 ) is !( 0 ) means !( false ) means ...

Voila!