2.2.1 Programming Techniques

Question 1

What is sequence?

Answer 1

When the lines of code are executed in order. The order of the lines of code is important as something can’t be called before it is referenced. e.g. a variable

Question 2

What is selection?

Answer 2

Used to decide which section of code should be run depending on a conditional statement.

Question 3

What operators can be used for comparison?

Answer 3

==
=!
<
>
>=
<=

Question 4

What is iteration?

Answer 4

Repeating sections of code where the same lines of code can be executed multiple times.

Question 5

What loops are involved in itteration?

Answer 5

FOR
WHILE
DO

Question 6

What are FOR loops?

Answer 6

used for repeating sections of code for a known number of times - although this can be changed by using a variable - but the lines will only repeat for that number of times.

Question 7

What are WHILE loops?

Answer 7

Conditional loops - the loop is only exeted when the condition is met.

Question 8

What are DO loops?

Answer 8

Similar to a while loop but the condition is checked at the end of the section so that the code is always executed at least once.

DO x ….[CODE]…. UNTIL y

Question 9

What is branching?

Answer 9

Jumping to other sections of code dependant on a condition. used within an if statement.

if x == y:
goto 2

Question 10

What is a subroutine?

Answer 10

;ji;