const number = 10;
console.log(number.constructor); // "number"
const string = "str";
console.log(string.constructor); // "string"
const boolean = true;
console.log(boolean.constructor); // "boolean"
const object = {};
console.log(object.constructor); // "object"
const func = function(){};
console.log(func.constructor); // "function"
const array = [];
console.log(array.constructor); // "array"
const date = getdate();
console.log(date.constructor); // "date"
const regexp = getregexp();
console.log(regexp.constructor); // "regexp"