✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

🤑 Join the Treehouse affiliate program and earn 25% recurring commission!

New No-Code Track! 🚀start learning today!

🌟 Dreaming of a bright future? 🎓 Ask about the Treehouse Scholarship program! 🚀

✨ Earn college credits in Cybersecurity, JS, HTML, CSS and Python

🤑 Join the Treehouse affiliate program and earn 25% recurring commission!

  • Treehouse Logo
  • Plans
    Chevron
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
  • Library
    Chevron
    • All Courses
    • Tracks
    • College Credit
  • Techdegree
    Chevron
    • Overview
    • Front End Development
    • Full Stack JavaScript
    • Data Analysis
    • UX Design
    • Python
  • Community
    Chevron
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
  • Resources
    Chevron
    • Career Toolbox
    • CodeForward
    • Free Treehouse Near Me
    • Jobs
    • Blog
    • Support
    • About
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks College Credit
  • Overview Front End Web Development Full Stack JavaScript Python Development Data Analysis UX Design
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Career Toolbox CodeForward Free Treehouse Near Me Jobs Blog Support About
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • Android
      • • APIs
      • • Coding for Kids
      • • College Credit
      • • Computer Science
      • • CSS
      • • Data Analysis
      • • Databases
      • • Design
      • • Development Tools
      • • Digital Literacy
      • • Game Development
      • • Go Language
      • • HTML
      • • Java
      • • JavaScript
      • • Learning Resources
      • • Machine Learning
      • • No-Code
      • • PHP
      • • Professional Growth
      • • Python
      • • Quality Assurance
      • • React
      • • Ruby
      • • Security
      • • Swift
    • Showing results for:
    • JavaScript
    • Overview
    • Close
  • vamosrope14
    vamosrope14
    14,932 Points

    What does block-level scoping mean, especially in terms related to const?

    Posted on Jun 8, 2019 by vamosrope14
    vamosrope14
    14,932 Points
    • JavaScript
    • Overview

    1 Answer

  • John Pierce
    PLUS
    John Pierce
    Courses Plus Student 5,108 Points

    is let a bad idea in for loops which will iterate many times?

    Posted on Jun 8, 2017 by John Pierce
    John Pierce
    Courses Plus Student 5,108 Points
    • JavaScript
    • Overview

    2 Answers

  • Quinneisha Brooks
    Quinneisha Brooks
    3,324 Points

    I'm in code school currently and const and let have never even been brought up. Is this video still valid in 2017?

    Posted on Mar 6, 2017 by Quinneisha Brooks
    Quinneisha Brooks
    3,324 Points
    • JavaScript
    • Overview

    4 Answers

  • Brendan Moran
    Brendan Moran
    14,052 Points

    PSA: const and let cannot be redeclared.

    Posted on Jan 10, 2017 by Brendan Moran
    Brendan Moran
    14,052 Points
    • JavaScript
    • Overview

    3 Answers

  • Michael Stedman
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    Michael Stedman
    Full Stack JavaScript Techdegree Student 13,838 Points

    So, just to confirm... Do not use the keyword "var" anymore?

    Posted on Jan 3, 2017 by Michael Stedman
    .a{fill-rule:evenodd;}techdegree
    Michael Stedman
    Full Stack JavaScript Techdegree Student 13,838 Points
    • JavaScript
    • Overview

    6 Answers

Posting to the forum is only allowed for members with active accounts.
Please sign in or sign up to post.

    Treehouse

  • About
  • Blog
  • Careers
  • Community
  • Stories
  • Shop
  • Contact
  • Gift Card

See Full Catalogue

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
  • Python Development
  • Data Analysis
  • UX Design

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
  • ...see more

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
  • ...see more

Explore

  • Plans
  • Affiliates
  • Perks
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
Terms & Conditions | Privacy

© 2025 Treehouse Island, Inc.