(!)

const a = 3;
const b = -2;

console.log(!(a > 0 || b > 0));
// Expected output: false

!expr;

n1 = !true; // !t  false
n2 = !false; // !f  true
n3 = !""; // !f  true
n4 = !"Cat"; // !t  false

n1 = !!true; // !!truthy  true
n2 = !!{}; // !!truthy  true:   - ...
n3 = !!new Boolean(false); // ... Boolean-   false   .valueOf()!
n4 = !!false; // !!falsy  false
n5 = !!""; // !!falsy  false
n6 = !!Boolean(false); // !!falsy  false

!!bCondition;

bCondition;