This section of program code may be used as a validation check. 1 PRINT "Input a value between 0 and 100 inclusive" 2 INPUT Value 3 WHILE Value < 0 OR Value > 100 4 PRINT "Invalid value, try again" 5 INPUT Value 6 ENDWHILE 7 PRINT "Accepted: ", Value

Mark scheme

Marking points from the official mark scheme (May/June 2019). The mark or mark type is shown in brackets.

1. [1] Range check
2. [2] Two from: • The entered number (Value) is being checked to see that it is not < 0 or not > 100 • If it is, it is rejected and the user has to enter another number / an error message is displayed • Otherwise the number is accepted, the word 'Accepted' is output along with the Value
3. [3] 1 mark - Value column 1 mark - OUTPUT column first line 1 mark - OUTPUT column lines two to five Value OUTPUT Input a value between 0 and 100 inclusive 200 Invalid value, try again 300 Invalid value, try again -1 Invalid value, try again 50 Accepted: 50
4. [5] 1 mark - Input prompt and input value 1 mark - Correct decision box labelled sufficiently (Yes/No) – allow 2 decision boxes 1 mark - Remaining outputs correct 1 mark - All connecting lines and arrows to be complete and correct 1 mark - Standard flowchart symbols used