Karel Quizzes 11-15 (If/Else- Indent)

Why do we use if/else statements in JavaScript?

• To repeat something for a fixed number of times

• To either do something if a condition is true or do something else

• To break out of some block of code

• To repeat something while a condition is true

What does an if/else statement look like in JavaScript?

• if (condition) {

  //code

  }

• for (var i = 0; i < count; i++) {

  //code

  }

• if (condition) {

  //code

  }

  if (condition) {

  //code

  }

• if (condition) {

  //code

  } else {

  //code

  }

Why do we use while loops in JavaScript?

• To break out of some block of code

• To do something if a condition is true

• To repeat some code while a condition is true

• To repeat something for a fixed number of times

Which general while loop definition is written correctly?

• while (x is true) {

  // code

  }

• if (i<5) {

  //code

  }

• while (var i = 0; i < count; i++) {

  //code

  }

• while (condition) {

  //code

  }

What do we use control structures for in JavaScript?

• Control the flow of the program; how the commands execute.

• Start our JavaScript program

• Store information for later

• Teach Karel new commands

Which of the below are examples of control structures?

(I) if

(II) if/else

(III) while

(IV) for

• I only

• I and II only

• III and I only

• I, II, III, and IV

You need to write a program that has Karel move 6 times and then put a ball.

Which control structure do you need to use?

• For loop

• While Loop

• If Statement

• If/Else statement

• None of these

You need to write a program that has Karel take all the tennis balls where Karel is standing if there are any there.

Karel should end up with no tennis balls on that spot.

Which control structure do you need to use?

• For Loop

• While Loop

• If Statement

• If/Else Statement

• None of these

You need to write a program that has Karel put down a tennis ball if the world has dimensions of 1x1.

Which control structure do you need to use?

• For Loop

• If Statement

• If/Else statement

• None of these

You need to write a program that has Karel move if the front is clear, but if it isn’t clear, Karel will do nothing.

Which control structure do you need to use?

• For Loop

• While Loop

• If Statement

• If/Else statement

• None of these