Robot Questions

Directions & Hints

●

Given: The initial position and direction of the robot is shown for
each problem with the teal triangle.

●

Goal: Run the code with scratch-work, find the correct end
position and direction and place the gold triangle there.

●

To move: use mouse, or use arrow keys: 6 times to move 1 box

●

To rotate:alt+leftoralt+right: 6 times for 90° rotation

●

You may duplicate slides to work through it:ctrl+d

○Hint: Change the background of the working slide

●Printout ← here is a copy for you, so print at home

i ← 1
ROTATE_LEFT()
MOVE_FORWARD()
REPEAT 4 TIMES
{
if( i = 1 )
{
MOVE_FORWARD()
}
else
{
ROTATE_RIGHT()
}
MOVE_FORWARD()
i ← i + 1
}
ROTATE_RIGHT()

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#1

i ← 1
ROTATE_RIGHT()
ROTATE_RIGHT()
REPEAT 3 TIMES
{
ROTATE_RIGHT()
REPEAT i TIMES
{
MOVE_FORWARD()
}
i ← i + 1
}
ROTATE_RIGHT()

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#2

i ← 3
ROTATE_RIGHT()
REPEAT 2 TIMES
{
MOVE_FORWARD()
MOVE_FORWARD()
if( i = 2 )
{
MOVE_FORWARD()
}
else
{
if( i ≥ 3 )
{
MOVE_FORWARD()
}
}
ROTATE_LEFT()
i ← i - 1
}

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#3

i ← 4
ROTATE_RIGHT()
REPEAT 4 TIMES
{
MOVE_FORWARD()
if( i ≤ 2 )

{

ROTATE_LEFT()
}
else
{
if( i ≥ 3 )
{
ROTATE_RIGHT()
}
else
{
MOVE_FORWARD()
}
}

i ← i - 1

}
MOVE_FORWARD()

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#4

i ← 2
REPEAT 3 TIMES
{
if( i = 3 )
{
ROTATE_LEFT()
}
else
{
if( i ≤ 1 )
{
MOVE_FORWARD()
}
}
MOVE_FORWARD()
MOVE_FORWARD()
i ← i + 1
}
MOVE_FORWARD()
ROTATE_LEFT()

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#5

i ← 1
MOVE_FORWARD()
REPEAT 2 TIMES
{
ROTATE_RIGHT()

MOVE_FORWARD()
REPEAT i times

{
MOVE_FORWARD()
}

i ← i - 1

}
MOVE_FORWARD()

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#6

PROCEDURE comboMove(x)
{
REPEAT x TIMES
{
ROTATE_LEFT()
MOVE_FORWARD()
}
}

i ← 2
REPEAT 2 TIMES
{
MOVE_FORWARD()
comboMove(i)
MOVE_FORWARD()
i ← i - 1
}

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#7

PROCEDURE doSomething(a)
{
REPEAT a TIMES
{
MOVE_FORWARD()
}
}

i ← 1
REPEAT 3 TIMES
{
ROTATE_LEFT()
doSomething(i)
i ← i + 1
}
MOVE_FORWARD()
ROTATE_LEFT()

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#8

PROCEDURE Mystery(a)
{
REPEAT a TIMES
{
MOVE_FORWARD()
ROTATE_RIGHT()
}
}

i ← 3
ROTATE_LEFT()
ROTATE_LEFT()
REPEAT 2 TIMES
{
MOVE_FORWARD()
Mystery(i)
i ← i - 1
}

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#9

PROCEDURE DoSomething(a)
{
MOVE_FORWARD()
if( a > 2 )
{
MOVE_FORWARD()
}
else
{
if( a = 3 )
{
MOVE_FORWARD()
}
}
MOVE_FORWARD()
}

i ← 3
ROTATE_RIGHT()
REPEAT 2 TIMES
{
DoSomething(i)
MOVE_FORWARD()
ROTATE_RIGHT()
i ← i - 1
}

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#10