Please enable JavaScript to use CodeHS

CodeHS Logo
  • Products

    Products

    Explore what CodeHS has to offer for districts, schools, and teachers.

    • Coding LMS
    • Online IDE
    • CodeHS Pro
    • Computer Science Curriculum
    • Certifications
    • Professional Development
    • AI Creator

    Use Cases

    • Districts
    • Schools
    • Teachers
  • Products Explore what CodeHS has to offer for districts, schools, and teachers
    • Coding LMS
    • Online IDE
    • CodeHS Pro
    • Computer Science Curriculum
    • Certifications
    • Professional Development
    • AI Creator
    • Use Cases
      • Districts
      • Schools
      • Teachers
  • Platform
    • Assignments
      Create & configure your course assignments
    • Classroom
      Manage & organize your class with customizable settings
    • Grading
      Streamline your grading workflow.
    • Data
      Track & analyze student assessments & progress data
    • Write Code
      Write, run, & debug code all in a web-based IDE
    • Integrations
      Connect CodeHS to your district’s educational platform
  • Platform
    • Assignments
      Create & configure your course assignments
    • Classroom
      Manage & organize your class with customizable settings
    • Grading
      Streamline your grading workflow.
    • Data
      Track & analyze student assessments & progress data
    • Write Code
      Write, run, & debug code all in a web-based IDE
    • Integrations
      Connect CodeHS to your district’s educational platform
  • Curriculum

    Computer Science Curriculum

    Customizable K-12 Computer Science Curriculum

    Overview ›
    • Course Catalog
      • AP Courses
      • Interdisciplinary
      • Hour of Code
      • Spanish Courses
    • K-12 Pathways
      • Elementary
      • Middle School
      • High School
    • Standards
    • States
    • Supplemental Materials
      • Practice
      • Tutorials
      • Digital Textbooks
  • Curriculum Customizable K-12 Computer Science Curriculum
    • Course Catalog
      • AP Courses
      • Interdisciplinary
      • Hour of Code
      • Spanish Courses
    • K-12 Pathways
      • Elementary
      • Middle School
      • High School
    • States
    • Standards
    • Practice
    • Tutorials
    • Digital Textbooks
  • Professional DevelopmentPD

    Professional Development

    Online & In-Person Training for Teachers

    Overview ›
    • Online PD Courses
    • In-Person & Virtual Workshops
    • Free PD Events
    • Teacher Certification Prep
    • Microcredentials
    • PD Membership
  • Professional Development Online & In-Person Training for Teachers
    • Professional Development
    • Online PD Courses
    • In-Person & Virtual Workshops
    • Free PD Events
    • Teacher Certification Prep
    • Microcredentials
  • Online IDE

    Online IDE

    Write, Run, & Debug Code in an Online IDE

    Overview ›
    • JavaScript
    • Python
    • Java
    • HTML
    • C++
    • SQL
  • Online IDE Write, Run, & Debug Code in an Online IDE
    • Online IDE
    • JavaScript
    • Python
    • Java
    • HTML
    • C++
    • SQL
    • Karel
  • Resources
    • About
    • Privacy Center
    • Case Studies
    • States
    • Testimonials
    • Tweets
    • Read Write Code Blog
    • Coding in the Wild
    • Knowledge Base
    • Student Projects
    • Career Center
  • Resources
    • About
    • Privacy Center
    • Case Studies
    • States
    • Testimonials
    • Tweets
    • Read Write Code Blog
    • Coding in the Wild
    • Knowledge Base
    • Student Projects
    • Career Center
  • Request a Quote
  • Log In
  • Sign Up

New Sandbox Program

Click on one of our programs below to get started coding in the sandbox!

Java

JavaScript

Python 3

HTML

Karel

Turtle

View All

Exercise Filter out Even Indices

4 points

This code has diverged from the student’s work.