A procedure Count() will: 1. input a value (all values will be positive integers) 2. count the number of odd values and count the number of even values 3. repeat from step 1 until the value input is 99 4. output the two count values, with a suitable message. The value 99 must not be counted.

Mark scheme

Marking points from the official mark scheme (Oct/Nov 2023). The mark or mark type is shown in brackets.

1. [6] Mark as follows Max 6 marks:
2. 1 Procedure heading and ending
3. 2 Local COdd, CEven and ThisNum declared as integers
4. 3 Conditional loop while ThisNum <> 99
5. 4 Input ThisNum in a loop
6. 5 Check ThisNum is odd or even in a loop
7. 6 Increment appropriate count in a loop, both counts must have been initialised before loop
8. 7 After the loop output COdd and CEven with a suitable message following a reasonable attempt at counting
9. [3] One mark per set, including stated purpose. Max 3 marks
10. Example answers:
11. 1 data set with (only) odd values, terminated with 99
12. 2 data set with (only) even values, terminated with 99
13. 3 data sets with same number of odd and even values, terminated with 99
14. 4 data sets with all even / all odd with just one odd/even value, terminated with 99
15. 5 data sets with no values just final 99
16. 6 data sets without (terminating) 99 // missing or incorrectly placed 99