Seekh Logo

AI-powered learning platform providing comprehensive practice questions, detailed explanations, and interactive study tools across multiple subjects.

Explore Subjects

Sciences
  • Astronomy
  • Biology
  • Chemistry
  • Physics
Humanities
  • Psychology
  • History
  • Philosophy

Learning Tools

  • Study Library
  • Practice Quizzes
  • Flashcards
  • Study Summaries
  • Q&A Bank
  • PDF to Quiz Converter
  • Video Summarizer
  • Smart Flashcards

Support

  • Help Center
  • Contact Us
  • Privacy Policy
  • Terms of Service
  • Pricing

© 2025 Seekh Education. All rights reserved.

Seekh Logo
HomeHomework Helpcomputer-scienceJavaScript Variables and Data Types

JavaScript Variables and Data Types

The fundamental concepts in JavaScript that allow developers to store and manipulate data, including variables, constants, and data types such as numbers, strings, and objects, and the rules that govern their declaration, assignment, and usage

beginner
2 hours
Computer Science
0 views this week
Study FlashcardsQuick Summary
0

Overview

JavaScript variables are fundamental components that allow developers to store and manipulate data. Understanding how to declare and use variables is crucial for writing effective code. Variables can hold different types of data, including numbers, strings, and objects, each serving a unique purpose...

Quick Links

Study FlashcardsQuick SummaryPractice Questions

Key Terms

Variable
A named storage for data that can change during program execution.

Example: let age = 25;

Data Type
A classification that specifies which type of value a variable can hold.

Example: String, Number, Boolean.

Primitive Type
Basic data types that are not objects and have immutable values.

Example: Number and String are primitive types.

Reference Type
Data types that are objects and can hold collections of values.

Example: Arrays and Objects.

Scope
The context in which a variable is defined and accessible.

Example: A variable defined inside a function is local to that function.

Type Coercion
The automatic conversion of values from one data type to another.

Example: Adding a number and a string results in a string.

Related Topics

JavaScript Functions
Functions are reusable blocks of code that perform a specific task.
intermediate
JavaScript Arrays
Arrays are used to store multiple values in a single variable.
intermediate
JavaScript Objects
Objects are collections of key-value pairs that represent complex data.
intermediate

Key Concepts

VariablesData TypesScopeType Coercion