부등 연산자(!=)

console.log(1 != 1);
// Expected output: false

console.log("hello" != "hello");
// Expected output: false

console.log("1" != 1);
// Expected output: false

console.log(0 != false);
// Expected output: false

x != y;

x != y;

!(x == y);

3 != "3"; // false

3 !== "3"; // true

1 != 2; // true
"hello" != "hola"; // true

1 != 1; // false
"hello" != "hello"; // false

"1" != 1; // false
1 != "1"; // false
0 != false; // false
0 != null; // true
0 != undefined; // true
0 != !!null; // false, look at Logical NOT operator
0 != !!undefined; // false, look at Logical NOT operator
null != undefined; // false

const number1 = new Number(3);
const number2 = new Number(3);
number1 != 3; // false
number1 != number2; // true

const object1 = { key: "value" };
const object2 = { key: "value" };

object1 != object2; // true
object2 != object2; // false