Skip to main content

NOTICE: On Friday Nov 6, Workspaces will be temporarily unavailable for maintenance.

🚀 In our NEW AI Bootcamp you'll build a working app in 28 days, no experience required. Free to all subscription levels.

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

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

  • Treehouse Logo
    • For Individuals
    • For Businesses
    • For Schools
    • For Libraries
    • For Military
    • All Courses
    • Tracks
    • AI Bootcamp
    • College Credit
    • Techdegree Bootcamps
    • Front End Development
    • Full Stack JavaScript
    • Code Adventures
    • Discord
    • Forum
    • Success Stories
    • Treehouse Links
    • 100 Days of Code
    • Explore
    • Career Toolbox
    • Free Treehouse Near Me
    • Affiliates
    • Blog
    • Support
    • About
    • Learn
    • Beginner's Guide to Coding
    • Data Analysis with SQL & Python
    • Front-End Web Development
    • Python Programming Basics
    • Techdegree Bootcamp Overview
    • UX Design Fundamentals
    • AI Tools for Beginners
  • For Individuals For Businesses For Schools For Libraries For Military
  • All Courses Tracks AI Bootcamp College Credit
  • Techdegree Bootcamps Front End Web Development Full Stack JavaScript
  • Code Adventures Discord Forum Success Stories Treehouse Links 100 Days of Code
  • Explore Career Toolbox Free Treehouse Near Me Affiliates Blog Support About
    Learn Beginner's Guide to Coding Data Analysis with SQL & Python Front-End Web Development Python Programming Basics Techdegree Bootcamp Overview UX Design Fundamentals AI Tools for Beginners
  • Sign In
  • Free Trial
Instagram Twitter Facebook YouTube LinkedIn
Loading banner... Start your free trial at Treehouse
    • Newest
      • Newest
      • Active
      • Unanswered
      • Featured
    • All Topics
      • All Topics
      • • General Discussion
      • • AI
      • • 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
      • • Vibe Coding
  • Ingrid Davis
    Ingrid Davis
    4,000 Points

    Confused on looping back through after 'first' becomes 5

    Posted November 13, 2020 6:45am by Ingrid Davis
    Ingrid Davis
    4,000 Points
    • Computer Science
    • Introduction to Algorithms
    • Algorithms in Code
    • Binary Search in Code

    1 Answer

  • Calvin Secrest
    Calvin Secrest
    24,815 Points

    I am stump on what is the complexity and Big O notation within this algorithm

    Posted June 1, 2020 12:23pm by Calvin Secrest
    Calvin Secrest
    24,815 Points
    • Computer Science
    • Introduction to Algorithms
    • Algorithms in Code
    • Binary Search in Code

    3 Answers

  • Simohamed ALAOUI
    Simohamed ALAOUI
    3,580 Points

    🤔Im still confused about this part 👉 last = len(list)- 1.

    Posted September 3, 2019 6:42pm by Simohamed ALAOUI
    Simohamed ALAOUI
    3,580 Points
    • Computer Science
    • Introduction to Algorithms
    • Algorithms in Code
    • Binary Search in Code

    1 Answer

  • Hudhayfee Hassan
    Hudhayfee Hassan
    1,787 Points

    I seem to be getting the same Error message when running the Binary Search Algorithm myself...not sure why?

    Posted June 17, 2019 2:53pm by Hudhayfee Hassan
    Hudhayfee Hassan
    1,787 Points
    • Computer Science
    • Introduction to Algorithms
    • Algorithms in Code
    • Binary Search in Code

    3 Answers

  • Leo Yun Tao
    Leo Yun Tao
    15,956 Points

    Why must the midPoint + 1 or -1

    Posted February 23, 2019 1:40pm by Leo Yun Tao
    Leo Yun Tao
    15,956 Points
    • Computer Science
    • Introduction to Algorithms
    • Algorithms in Code
    • Binary Search in Code

    1 Answer

  • James Estrada
    seal-mask
    .a{fill-rule:evenodd;}techdegree
    James Estrada
    Full Stack JavaScript Techdegree Student 25,867 Points

    Why are we returning None at the end of the function?

    Posted November 20, 2018 10:11pm by James Estrada
    .a{fill-rule:evenodd;}techdegree
    James Estrada
    Full Stack JavaScript Techdegree Student 25,867 Points
    • Computer Science
    • Introduction to Algorithms
    • Algorithms in Code
    • Binary Search in Code

    1 Answer

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

Techdegree

  • Front End Web Development
  • Full Stack JavaScript
SEE ALL

Tracks

  • Learn to Code for Beginners
  • Beginning Python
  • Beginning SQL
  • Beginning Java
SEE ALL

Courses

  • JavaScript Basics
  • Intro to HTML & CSS
  • Python Basics
  • CSS Layout
SEE ALL

About Us

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

Explore

  • Plans
  • Affiliates
  • Perks
  • Shop
  • Free Treehouse Near Me
  • Treehouse for Libraries
  • Treehouse for Businesses

Treehouse is an online technology education platform founded in 2011. Treehouse offers more than 700 self-paced, video-based courses in web development, programming, data analysis, design, and AI, plus two project-based bootcamp programs in Front End Web Development and Full Stack JavaScript. Individual Treehouse plans start at $25 per month and include a 7-day free trial. Treehouse serves individual learners, businesses, schools, and public libraries. Cardholders at participating U.S. public libraries can use Treehouse for free. Select Treehouse courses, offered with University Pathways International, are recommended for college credit by ACE and NCCRS. Treehouse learners earn digital certificates for completed Tracks.

Terms & Conditions · Privacy · © 2026 Treehouse Island, Inc.
  • Twitter
  • YouTube
  • Facebook
  • LinkedIn
  • Instagram
  • Discord