Computer Science · May / June 2021 · Paper 22 · Question 2

Any six from:

MP1

Initialisation of large and small variables e.g. Large ← 0 Small ← 1000

MP2

Use of a loop for 500 entries // or 499 if initialisation done on first correct entry

MP3

Input with prompt

MP4

Attempt at checking the range of 1 to 999 for input

MP5

… working range check

MP6

Checking for a whole number

MP7

Selecting largest number

MP8

Selecting smallest number

MP9

Calculating the range

MP10 Outputting the largest, smallest and range with message

Large ← 0

Small ← 1000

FOR Count ← 1 TO 500

REPEAT

OUTPUT "Enter a whole number between 1 and 999"

INPUT Number

UNTIL Number >= 1 AND Number < 1000 AND Number = Number DIV 1

IF Number < Small

THEN

Small ← Number

ENDIF

IF Number > Large

THEN

Large ← Number

ENDIF

NEXT

Range ← Large – Small

OUTPUT "Largest number is ", Large, " Smallest number is ", Small, " Range of numbers is ", Range

One mark for action required and one mark for method used

Reduce the amount of numbers entered

By decreasing the final value of the loop

or

Remove the need to input values

By using random numbers / a previously populated array