Learn KAREL with Real Code Examples

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.

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

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

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.

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

Places a beeper on every step until wall.

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

Karel performs a 180° using two left turns.

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

Moves in a zigzag across two rows.

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.

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

Climbs three stair steps.

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

Checks if on a beeper, then moves.

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

Walks around a rectangle border.