This key facts covers Memory Trick: RPTFL-C within Input Validation for GCSE Computer Science. Revise Input Validation in 3.2 Programming for GCSE Computer Science with 15 exam-style questions and 8 flashcards. This topic shows up very often in GCSE exams, so students should be able to explain it clearly, not just recognise the term. It is section 4 of 6 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.
Memory Trick: RPTFL-C
"Repeat For Less Chaos":
- Range (min-max)
- Presence (not empty)
- Type (correct data type)
- Format (pattern match)
- Length (character count)
- Check digit (calculated)
Practice questions for Input Validation
A program asks the user to enter a score between 1 and 10. Which validation check should be used to ensure the number is within this range?
A registration form collects a username. The username must: not be blank, contain only letters and numbers, and be between 6 and 20 characters long. Identify three validation checks and explain what each one does for this input.