3.2 ProgrammingKey Facts

Memory Trick: RPTFL-C

Part of Input Validation · GCSE GCSE Computer Science revision

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.

Topic position

Section 4 of 6

Practice

15 questions

Recall

8 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)

Keep building this topic

Read this section alongside the surrounding pages in Input Validation. That gives you the full topic sequence instead of a single isolated revision point.

Deep Dive: Validation Examples Exam Tips The Bouncer at the Door Types of Validation

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. Type check
B. Range check
C. Length check
D. Presence check

1 markfoundation

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.

3 marksstandard

Quick Recall Flashcards

What is a type check?

Checking data is the correct data type (e.g., integer not text)

What is validation?

Checking input data is sensible and follows rules before processing

15 questions on Input Validation — practise free

Instant marking, adaptive difficulty, and 8 spaced repetition flashcards. Free until your GCSEs.

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Deep Dive: Validation Examples

Exam Tips