9 · Lesson 2 of 4
Data types and validation
Syllabus 9.2
What this lesson covers
- Suggest suitable data types
Key vocabulary
- Text / alphanumeric
- A data type for any mix of letters, digits and symbols.
- Character
- A data type for a single letter, digit or symbol.
- Boolean
- A data type with only two values: TRUE or FALSE.
- Integer
- A data type for whole numbers.
- Real
- A data type for numbers with a decimal point.
- Date / time
- A data type for dates and times.
- Validation
- An automatic check that data entered is sensible and reasonable.
- Verification
- A check that data has been entered accurately, e.g. double entry.
Check your learning
- Quick check: 4 questions
- Key vocabulary test: 8 terms
- Activity 1: Choose the data type · 8 questions
- Activity 2: Which validation check? · 8 questions
- Activity 3: Data types and validation quiz · 8 questions