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## PowerPoint Slideshow about 'computer programming with murtle the turtle' - Jims

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a program is a set of instructions

that tells a computer what to do.

java is a programming language.

java is object-oriented.

like a cookie.

a class is like a cookie-cutter.

with one cookie-cutter?

murtle is an object.

GTurtle murtle = new GTurtle();

- Press Ctrl+1 to compile your code
- If you see an error message
- Double-click on the first line of the error to return to the code.
- See if you can correct the problem.
- Pay attention to spelling and upper/lower case!
- Try to compile again (Ctrl+1)
- Continue until you see no more errors.
- Press Ctrl+3 to run your program

see murtle grow.

murtle.setSize(50);

see murtle spin.

murtle.right(360);

see murtle move.

murtle.forward(100);

so she can do things.

0

100

200

300

400

100

Don’t forget!Ctrl+1 to compileCtrl+3 to run

200

300

murtle.setLocation(200, 150);

Built-in colors:

BLACK

BLUE

CYAN

GRAY

GREEN

MAGENTA

ORANGE

PINK

RED

WHITE

YELLOW

murtle.setColor(Color.BLUE);

- Draw a square
- //Draw a square
- for (int j = 1; j <= 4; j++)
- {
- murtle.forward(100);
- murtle.right(90);
- }
- 2. How would you change the loop to draw:
- a pentagon?
- a hexagon?
- an octagon?

//Draw a bunch of squares

for (int i = 0; i < 36; i++)

{

//Draw a square

for (int j = 0; j < 4; j++)

{

murtle.forward(80);

murtle.right(90);

}

murtle.right(10);

}

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