Section 2.11 - If/Else Statements

What does an if/else statement allow Karel to do?

• Only lift a beeper if present

• Clean regardless of situation

• Perform one action if a condition is true, another if it's false

• Count how many beepers are on the ground

Which structure correctly uses if/else?

• if (frontIsClear()) { move(); } else { turnLeft(); }

• if frontIsClear move(); else turnLeft();

• for else if frontIsClear move();

• if (frontIsClear()) then move() else turnLeft()

A scenario in Karel where using an if/else statement would be more appropriate than just if is:

• When Karel needs to perform one action if a condition is true and a different action if it is false.

• When Karel only needs to check a condition and act if it is true, doing nothing otherwise.

• When Karel always performs the same action regardless of the condition.

• When Karel needs to repeat an action multiple times.

Which of the following best describes the purpose of an if/else statement in Karel?

• To let Karel pick up all beepers in the world.

• To allow Karel to choose between two different actions based on a condition.

• To make Karel repeat an action until a condition is met.

• To make Karel ignore all conditions and always move forward.

What will Karel do if the following code is executed and front is not clear?
if (frontIsClear()) { move(); } else { turnLeft(); }

• Karel will pick up a beeper.

• Karel will do nothing.

• Karel will turn left.

• Karel will move forward.

When should you use an if/else statement instead of just an if statement in Karel's program?

• When you want Karel to do something different if the condition is false.

• When Karel should always move forward.

• When Karel needs to repeat an action many times.

• When Karel only needs to act if a condition is true.