KS3 Computing -- Iteration: FOR or WHILE?

Leo wants to write a program that will print out any times-table (up to 10 places) at the users request. Should he use:

• A FOR loop

• A WHILE loop

Leah is writing a program that will ask the user to enter 10 numbers, and will then print the total. Should she use:

• A FOR loop

• A WHILE loop

Maryam is writing a multi-choice quiz program. She wants to make sure that the user can only enter A, B or C for each question and that any other answer is rejected until an acceptable response is entered. She knows she will need a loop, but which one?

• a FOR loop

• a WHILE loop

Aran has written an average program (shown here) Which of the following statements about his program are accurate? (select as many as appropriate)

• The program will not work & contains syntax errors

• The program is inefficient

• The program could be improved with the use of a WHILE loop

• The program could be improved with the use of a FOR loop

• The program is efficient

Zoe is writing a program that will join letters together to form a single word. The user can enter as many letters as they want until the user quits by entering a * character. The program contains some errors. Are the errors in lines..

• 2,3,6,9 ?

• 3,6,7,8 ?

• 2,4,6,8 ?

• 3,6,7,9 ?

A FOR loop is...

• A COUNT controlled loop

• A CONDITION controlled loop

A WHILE loop is...

• A COUNT controlled loop

• A CONDITION controlled loop

TRUE or FALSE - a computer program MUST contain ITERATION (i.e. a loop)

• TRUE

• FALSE

In a CONDITION CONTROLLED loop, the code inside the loop will run until a particular "condition" has been met. Which of the following are possible examples of "conditions" that could be used in such a loop? (select as many as appropriate)

• number1 < number2

• answer == "True"

• Choice == "Y" or Choice == "N"

Jaz is writing a program to count 60 seconds, printing the current time passed after each second. He will need to use a loop - should he use..

• a FOR loop?

• a WHILE loop?