Section 2.12 – While Loops in Karel

A while loop continues as long as:

• Its condition is false

• Its condition is true

• Karel runs out of beepers

• The program hits a wall

Which is an example of an effective while loop?

• while (frontIsClear()) { move(); }

• if (frontIsClear()) move();

• for (i = 0; i < 5; i++) move();

• repeat move while front is clear

What will happen if the condition in a while loop is always false?

• The program will crash

• The loop will run infinitely

• The loop will never run

• The loop will run once

Which of the following best describes the purpose of a while loop?

• To execute a block of code as long as a condition is true

• To repeat code for each item in a list

• To check a condition once and execute code if true

• To execute a block of code a fixed number of times

Which statement correctly ends a while loop?

• When a variable is declared

• When the loop's condition becomes false

• After one iteration

• When the program starts