Which of the following is non primitive type in JavaScript data type?

Bobby 72 Published: 12/21/2024

Which of the following is non primitive type in JavaScript data type?

I'm happy to respond in English for you today!

In JavaScript, a "primitive" refers to one of the basic built-in data types that are not objects or arrays. The seven primitive types in JavaScript are:

Number: This is a numeric value, which can be either an integer (e.g., 42) or a decimal (e.g., 3.14). String: This is a sequence of characters, which can include letters, numbers, and special characters. Boolean: This is a logical value that can have one of two states: true or false. Null: This represents the intentional absence of any object value. Undefined: This represents an uninitialized variable (i.e., one that hasn't been assigned a value). Symbol: This is a unique and immutable identifier, introduced in ECMAScript 2015. BigInt: This is a large integer value, which can be either a signed or unsigned integer.

So, what's not primitive? Well, the answer is: all non-primitive data types are objects, including:

Arrays (like ["hello", "world"]) Objects (like { name: "John" }) Functions (like function sayHello() { console.log("Hi!"); }) Dates and Times Regular Expressions

These non-primitive data types are created using constructors or functions, such as the Array() constructor or the Object.create() method. In contrast, primitive values are created directly by assigning a value to a variable.

Here's a summary:

Primitive Types:

Number String Boolean Null Undefined Symbol BigInt

Non-Primitive Types (Objects):

Arrays Objects Functions Dates and Times Regular Expressions

I hope this clarifies the distinction between primitive types and non-primitive types in JavaScript!

Variables and data types in Java

I'm glad you asked!

In Java, variables are storage locations that hold values of a specific type. Understanding the basics of variables and data types is crucial for building robust and efficient programs.

Data Types

Java has several primitive data types that can be used to store values:

int: A whole number between -2,147,483,648 and 2,147,483,647. long: A whole number between -9,223,372,036,854,775,807 and 9,223,372,036,854,775,806. float: A decimal number with a minimum value of approximately 1.4E-45 and a maximum value of approximately 3.4E38. double: A double-length decimal number with a minimum value of approximately 4.9E-324 and a maximum value of approximately 1.8E308. boolean: A true or false value. char: A single character (Unicode character). byte: An 8-bit unsigned integer between 0 and 255.

Variables

To declare a variable in Java, you need to specify the data type and name of the variable. For example:

int x; // declares an integer variable named x

You can also initialize the variable when declaring it:

int y = 10; // declares an integer variable named y with the initial value 10

Variable Naming Conventions

In Java, variable names must follow certain rules:

They must start with a letter or the underscore character (_). They cannot contain whitespace characters (spaces, tabs, etc.). They can contain letters, digits, and underscores.

Here are some examples of valid variable names: x, total, myName, isReady, and so on.

Scope and Lifetime

A variable's scope refers to the region of the program where it is accessible. In Java, variables have the following scopes:

Local: Variables declared within a method or block are local. Instance: Variables declared within an instance (class) are instance variables. Static: Variables declared using the static keyword are static.

The lifetime of a variable refers to when it is created and when it is destroyed. In Java, variables have the following lifetimes:

Stack-based: Local variables are stored on the stack and are automatically destroyed when the method returns. Heap-based: Instance variables are stored on the heap and are only destroyed when the object is garbage collected.

I hope this helps! Let me know if you have any questions or need further clarification.