Learn Practice Reference Projects Playground Code tracer Pro

0 0 XP

JavaScript basics

Question 1 of 7Score 0

Which keyword declares a variable you can change later?

Learn to code by building: short lessons, a live editor and instant checks. Free, with no sign-up and no ads.

Learn

HTML
CSS
JavaScript
C++
C#

Practice

Challenges and quizzes
Projects
Your progress

Tools

Playground
Code tracer
Reference

Codeloft

About
Pro
Privacy

© 2026 Codeloft Academy. Reference links go to MDN, cppreference and Microsoft Learn.Progress saved on this device.