const b = true;
const n = 84938;
const s = "typescript";
const obj = {
id: 1234,
name: "ben",
salary: 13900,
work: true
}
console.log(typeof b);
console.log(typeof n);
console.log(typeof s);
console.log(typeof obj);
console.log(typeof obj.id);
console.log(typeof X);
/*
run:
"boolean"
"number"
"string"
"object"
"number"
"undefined"
*/