如何识别内置类型的类型？

var num = 10;
console.log(typeof num);  // 输出 "number"

var str = "Hello";
console.log(typeof str);  // 输出 "string"

var bool = true;
console.log(typeof bool);  // 输出 "boolean"

String str = "Hello";
if (str instanceof String) {
    System.out.println("str is an instance of String");
} else {
    System.out.println("str is not an instance of String");
}

num = 10
print(type(num))  # 输出 "<class 'int'>"

str = "Hello"
print(type(str))  # 输出 "<class 'str'>"

bool = True
print(type(bool))  # 输出 "<class 'bool'>"