Learn Karel - 10 Code Examples & CST Typing Practice Test

Karel is an educational programming environment where learners control a simple robot in a grid-based world using commands. It teaches fundamental programming concepts such as sequencing, loops, conditionals, and procedures through highly visual problem-solving.

View all 10 Karel code examples →

Simple Karel Program Karel Square Loop Karel Clean Street Karel Line Builder Karel Turn Around Karel Zigzag Pattern Karel Wall Follower Karel Stair Climb Karel Beeper Checker Karel Border Walk

Learn KAREL with Real Code Examples

Updated Nov 25, 2025

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Code Sample Descriptions

Simple Karel Program

BEGINNING-OF-PROGRAM
    MOVE
    MOVE
    MOVE
    PICKBEEPER
    TURNLEFT
    MOVE
    PUTBEEPER
END-OF-PROGRAM

Karel moves forward 3 steps, picks beeper, turns left, and places it.

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Karel Square Loop

BEGINNING-OF-PROGRAM
    ITERATE 4 TIMES
        MOVE
        TURNLEFT
    END
END-OF-PROGRAM

Karel moves in a 4-step square using a loop.

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Karel Clean Street

BEGINNING-OF-PROGRAM
    WHILE FRONT-IS-CLEAR
        MOVE
        WHILE NEXT-TO-A-BEEPER
        PICKBEEPER
        END
    END
END-OF-PROGRAM

Karel moves forward and picks all beepers until blocked.

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Karel Line Builder

BEGINNING-OF-PROGRAM
    WHILE FRONT-IS-CLEAR
        PUTBEEPER
        MOVE
    END
    PUTBEEPER
END-OF-PROGRAM

Places a beeper on every step until wall.

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Karel Turn Around

BEGINNING-OF-PROGRAM
    TURNLEFT
    TURNLEFT
END-OF-PROGRAM

Karel performs a 180° using two left turns.

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Karel Zigzag Pattern

BEGINNING-OF-PROGRAM
    MOVE
    TURNLEFT
    MOVE
    TURNLEFT
    MOVE
    TURNLEFT
    MOVE
END-OF-PROGRAM

Moves in a zigzag across two rows.

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Karel Wall Follower

BEGINNING-OF-PROGRAM
    WHILE NOT-FACING-NORTH
        TURNLEFT
    END
    WHILE NOT-NEXT-TO-A-BEEPER
        IF RIGHT-IS-CLEAR
        TURNRIGHT
        MOVE
        ELSE
        IF FRONT-IS-CLEAR
        MOVE
        ELSE
        TURNLEFT
        END
        END
    END
END-OF-PROGRAM

Follows a right-hand rule until goal.

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Karel Stair Climb

BEGINNING-OF-PROGRAM
    MOVE
    TURNLEFT
    MOVE
    TURNRIGHT
    MOVE
    TURNLEFT
    MOVE
    TURNRIGHT
    MOVE
END-OF-PROGRAM

Climbs three stair steps.

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Karel Beeper Checker

BEGINNING-OF-PROGRAM
    IF NEXT-TO-A-BEEPER
        PICKBEEPER
    END
    MOVE
END-OF-PROGRAM

Checks if on a beeper, then moves.

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Karel Border Walk

BEGINNING-OF-PROGRAM
    ITERATE 4 TIMES
        ITERATE 3 TIMES
        MOVE
        END
        TURNLEFT
    END
END-OF-PROGRAM

Walks around a rectangle border.

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Frequently Asked Questions about Karel

What is Karel?

What are the primary use cases for Karel?

Introductory programming education. Teaching loops and conditionals visually. Problem-solving and algorithmic thinking. High school CS courses. Logic-based robotics simulations

What are the strengths of Karel?

Very easy for beginners. Immediate visual feedback. Teaches algorithmic patterns. Minimal syntax barriers. Stable and widely adopted in CS education

What are the limitations of Karel?

Not suitable for real software development. Highly simplified environment. Limited data structures. Minimal language features. Primarily pedagogical

How can I practice Karel typing speed?

CodeSpeedTest offers 10+ real Karel code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.

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Learn Karel - 10 Code Examples & CST Typing Practice Test

Code Sample Descriptions

Simple Karel Program

BEGINNING-OF-PROGRAM
    MOVE
    MOVE
    MOVE
    PICKBEEPER
    TURNLEFT
    MOVE
    PUTBEEPER
END-OF-PROGRAM

Karel moves forward 3 steps, picks beeper, turns left, and places it.

Let’s Try →

Karel Square Loop

BEGINNING-OF-PROGRAM
    ITERATE 4 TIMES
        MOVE
        TURNLEFT
    END
END-OF-PROGRAM

Karel moves in a 4-step square using a loop.

Let’s Try →

Karel Clean Street

BEGINNING-OF-PROGRAM
    WHILE FRONT-IS-CLEAR
        MOVE
        WHILE NEXT-TO-A-BEEPER
        PICKBEEPER
        END
    END
END-OF-PROGRAM

Karel moves forward and picks all beepers until blocked.

Let’s Try →

Karel Line Builder

BEGINNING-OF-PROGRAM
    WHILE FRONT-IS-CLEAR
        PUTBEEPER
        MOVE
    END
    PUTBEEPER
END-OF-PROGRAM

Places a beeper on every step until wall.

Let’s Try →

Karel Turn Around

BEGINNING-OF-PROGRAM
    TURNLEFT
    TURNLEFT
END-OF-PROGRAM

Karel performs a 180° using two left turns.

Let’s Try →

Karel Zigzag Pattern

BEGINNING-OF-PROGRAM
    MOVE
    TURNLEFT
    MOVE
    TURNLEFT
    MOVE
    TURNLEFT
    MOVE
END-OF-PROGRAM

Moves in a zigzag across two rows.

Let’s Try →

Karel Wall Follower

BEGINNING-OF-PROGRAM
    WHILE NOT-FACING-NORTH
        TURNLEFT
    END
    WHILE NOT-NEXT-TO-A-BEEPER
        IF RIGHT-IS-CLEAR
        TURNRIGHT
        MOVE
        ELSE
        IF FRONT-IS-CLEAR
        MOVE
        ELSE
        TURNLEFT
        END
        END
    END
END-OF-PROGRAM

Follows a right-hand rule until goal.

Let’s Try →

Karel Stair Climb

BEGINNING-OF-PROGRAM
    MOVE
    TURNLEFT
    MOVE
    TURNRIGHT
    MOVE
    TURNLEFT
    MOVE
    TURNRIGHT
    MOVE
END-OF-PROGRAM

Climbs three stair steps.

Let’s Try →

Karel Beeper Checker

BEGINNING-OF-PROGRAM
    IF NEXT-TO-A-BEEPER
        PICKBEEPER
    END
    MOVE
END-OF-PROGRAM

Checks if on a beeper, then moves.

Let’s Try →

Karel Border Walk

BEGINNING-OF-PROGRAM
    ITERATE 4 TIMES
        ITERATE 3 TIMES
        MOVE
        END
        TURNLEFT
    END
END-OF-PROGRAM

Walks around a rectangle border.

Let’s Try →

Frequently Asked Questions about Karel

What is Karel?

What are the primary use cases for Karel?

Introductory programming education. Teaching loops and conditionals visually. Problem-solving and algorithmic thinking. High school CS courses. Logic-based robotics simulations

What are the strengths of Karel?

Very easy for beginners. Immediate visual feedback. Teaches algorithmic patterns. Minimal syntax barriers. Stable and widely adopted in CS education

What are the limitations of Karel?

Not suitable for real software development. Highly simplified environment. Limited data structures. Minimal language features. Primarily pedagogical

How can I practice Karel typing speed?

CodeSpeedTest offers 10+ real Karel code examples for typing practice. You can measure your WPM, track accuracy, and improve your coding speed with guided exercises.