Y9 Java (Karel the dog)

Why do we use functions in programming?

• Makes the code more efficient

• Functions take less time to write

• The program reads functions at a faster pace

• Easier to debug/problem solve a program

for(var i = 1; i < 6; i++){

putBall();

How many times will a ball be placed?

• 5

• 6

• 7

• 8

for(var i = 0; i < 8; i++){

move();

How many times will Karel move?

• 5

• 6

• 7

• 8

function example() {

for(var i = 0; i < 3; i++){

turnLeft();

}

• Karel starts facing East and finishes facing East

• Karel starts facing East and finishes facing South

• Karel starts facing East and finishes facing West

• Karel starts facing East and finishes facing North

Why do we use a for loop in programming

• Easier to read

• It's more efficient

• To repeat an action a number of times

• It helps with sequencing

Which code is correct? Karel starts at 0,0.

• for(var i = 0; i < 4; i++){

  move();

  }

  putBall();

• for(var i = 0; i < 2; i++){

  move();

  }

  putBall();

• for(var i = 0; i < 3; i++){

  move();

  }

  putBall();

which code is correct? Karel starts at 0,0

• for(var i = 0; i < 2; i++){

  move();

  turnLeft();

  move();

  }

  putBall();

• for(var i = 0; i < 3; i++){

  move();

  turnLeft();

  move();

  }

  putBall();

• for(var i = 0; i < 1; i++){

  move();

  turnLeft();

  move();

  }

  putBall();

Which code is correct? Karel starts at 0,0.

• for(var i = 1; i < 4; i++){

  putBall();

  move();

  }

• for(var i = 1; i < 3; i++){

  putBall();

  move();

  }

• for(var i = 1; i < 2; i++){

  putBall();

  move();

  }

Which is the correct code? Karel starts at 0,0.

• for(var i = 2; i < 5; i++){

  move();

  }

  putBall();

• for(var i = 2; i < 6; i++){

  move();

  }

  putBall();

• for(var i = 2; i < 4; i++){

  move();

  }

  putBall();

Which code is correct? Karel starts at 0,0.

• for(var i = 9; i < 12; i++){

  move();

  putBall();

  }

  move();

• for(var i = 11; i < 12; i++){

  move();

  putBall();

  }

  move();

• for(var i = 10; i < 12; i++){

  move();

  putBall();

  }

  move();